#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/wait.h>
+#include <unistd.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <inttypes.h>
#include "qga/guest-agent-core.h"
#include "qga-qmp-commands.h"
#include "qapi/qmp/qerror.h"
#endif
#endif
-static void ga_wait_child(pid_t pid, int *status, Error **err)
+static void ga_wait_child(pid_t pid, int *status, Error **errp)
{
pid_t rpid;
} while (rpid == -1 && errno == EINTR);
if (rpid == -1) {
- error_setg_errno(err, errno, "failed to wait for child (pid: %d)", pid);
+ error_setg_errno(errp, errno, "failed to wait for child (pid: %d)",
+ pid);
return;
}
g_assert(rpid == pid);
}
-void qmp_guest_shutdown(bool has_mode, const char *mode, Error **err)
+void qmp_guest_shutdown(bool has_mode, const char *mode, Error **errp)
{
const char *shutdown_flag;
Error *local_err = NULL;
} else if (strcmp(mode, "reboot") == 0) {
shutdown_flag = "-r";
} else {
- error_setg(err,
+ error_setg(errp,
"mode is invalid (valid values are: halt|powerdown|reboot");
return;
}
reopen_fd_to_null(1);
reopen_fd_to_null(2);
- execle("/sbin/shutdown", "shutdown", shutdown_flag, "+0",
+ execle("/sbin/shutdown", "shutdown", "-h", shutdown_flag, "+0",
"hypervisor initiated shutdown", (char*)NULL, environ);
_exit(EXIT_FAILURE);
} else if (pid < 0) {
- error_setg_errno(err, errno, "failed to create child process");
+ 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(err, local_err);
+ if (local_err) {
+ error_propagate(errp, local_err);
return;
}
if (!WIFEXITED(status)) {
- error_setg(err, "child process has terminated abnormally");
+ error_setg(errp, "child process has terminated abnormally");
return;
}
if (WEXITSTATUS(status)) {
- error_setg(err, "child process has failed to shutdown");
+ error_setg(errp, "child process has failed to shutdown");
return;
}
- /* succeded */
+ /* succeeded */
}
int64_t qmp_guest_get_time(Error **errp)
return time_ns;
}
-void qmp_guest_set_time(int64_t time_ns, Error **errp)
+void qmp_guest_set_time(bool has_time, int64_t time_ns, Error **errp)
{
int ret;
int status;
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;
- }
+ /* If user has passed a time, validate and set it. */
+ if (has_time) {
+ /* 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;
+ 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;
+ 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. */
+ /* Now, if user has passed a time to set and the system time is set, we
+ * just need to synchronize the hardware clock. However, if no time was
+ * passed, user is requesting the opposite: set the system time from the
+ * hardware clock (RTC). */
pid = fork();
if (pid == 0) {
setsid();
reopen_fd_to_null(1);
reopen_fd_to_null(2);
- execle("/sbin/hwclock", "hwclock", "-w", NULL, environ);
+ /* Use '/sbin/hwclock -w' to set RTC from the system time,
+ * or '/sbin/hwclock -s' to set the system time from RTC. */
+ execle("/sbin/hwclock", "hwclock", has_time ? "-w" : "-s",
+ NULL, environ);
_exit(EXIT_FAILURE);
} else if (pid < 0) {
error_setg_errno(errp, errno, "failed to create child process");
}
ga_wait_child(pid, &status, &local_err);
- if (error_is_set(&local_err)) {
+ if (local_err) {
error_propagate(errp, local_err);
return;
}
int64_t handle;
handle = ga_get_fd_handle(ga_state, errp);
- if (error_is_set(errp)) {
- return 0;
+ if (handle < 0) {
+ return -1;
}
gfh = g_malloc0(sizeof(GuestFileHandle));
return handle;
}
-static GuestFileHandle *guest_file_handle_find(int64_t id, Error **err)
+static GuestFileHandle *guest_file_handle_find(int64_t id, Error **errp)
{
GuestFileHandle *gfh;
}
}
- error_setg(err, "handle '%" PRId64 "' has not been found", id);
+ error_setg(errp, "handle '%" PRId64 "' has not been found", id);
return NULL;
}
-int64_t qmp_guest_file_open(const char *path, bool has_mode, const char *mode, Error **err)
+typedef const char * const ccpc;
+
+#ifndef O_BINARY
+#define O_BINARY 0
+#endif
+
+/* http://pubs.opengroup.org/onlinepubs/9699919799/functions/fopen.html */
+static const struct {
+ ccpc *forms;
+ int oflag_base;
+} guest_file_open_modes[] = {
+ { (ccpc[]){ "r", NULL }, O_RDONLY },
+ { (ccpc[]){ "rb", NULL }, O_RDONLY | O_BINARY },
+ { (ccpc[]){ "w", NULL }, O_WRONLY | O_CREAT | O_TRUNC },
+ { (ccpc[]){ "wb", NULL }, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY },
+ { (ccpc[]){ "a", NULL }, O_WRONLY | O_CREAT | O_APPEND },
+ { (ccpc[]){ "ab", NULL }, O_WRONLY | O_CREAT | O_APPEND | O_BINARY },
+ { (ccpc[]){ "r+", NULL }, O_RDWR },
+ { (ccpc[]){ "rb+", "r+b", NULL }, O_RDWR | O_BINARY },
+ { (ccpc[]){ "w+", NULL }, O_RDWR | O_CREAT | O_TRUNC },
+ { (ccpc[]){ "wb+", "w+b", NULL }, O_RDWR | O_CREAT | O_TRUNC | O_BINARY },
+ { (ccpc[]){ "a+", NULL }, O_RDWR | O_CREAT | O_APPEND },
+ { (ccpc[]){ "ab+", "a+b", NULL }, O_RDWR | O_CREAT | O_APPEND | O_BINARY }
+};
+
+static int
+find_open_flag(const char *mode_str, Error **errp)
+{
+ unsigned mode;
+
+ for (mode = 0; mode < ARRAY_SIZE(guest_file_open_modes); ++mode) {
+ ccpc *form;
+
+ form = guest_file_open_modes[mode].forms;
+ while (*form != NULL && strcmp(*form, mode_str) != 0) {
+ ++form;
+ }
+ if (*form != NULL) {
+ break;
+ }
+ }
+
+ if (mode == ARRAY_SIZE(guest_file_open_modes)) {
+ error_setg(errp, "invalid file open mode '%s'", mode_str);
+ return -1;
+ }
+ return guest_file_open_modes[mode].oflag_base | O_NOCTTY | O_NONBLOCK;
+}
+
+#define DEFAULT_NEW_FILE_MODE (S_IRUSR | S_IWUSR | \
+ S_IRGRP | S_IWGRP | \
+ S_IROTH | S_IWOTH)
+
+static FILE *
+safe_open_or_create(const char *path, const char *mode, Error **errp)
+{
+ Error *local_err = NULL;
+ int oflag;
+
+ oflag = find_open_flag(mode, &local_err);
+ if (local_err == NULL) {
+ int fd;
+
+ /* If the caller wants / allows creation of a new file, we implement it
+ * with a two step process: open() + (open() / fchmod()).
+ *
+ * First we insist on creating the file exclusively as a new file. If
+ * that succeeds, we're free to set any file-mode bits on it. (The
+ * motivation is that we want to set those file-mode bits independently
+ * of the current umask.)
+ *
+ * If the exclusive creation fails because the file already exists
+ * (EEXIST is not possible for any other reason), we just attempt to
+ * open the file, but in this case we won't be allowed to change the
+ * file-mode bits on the preexistent file.
+ *
+ * The pathname should never disappear between the two open()s in
+ * practice. If it happens, then someone very likely tried to race us.
+ * In this case just go ahead and report the ENOENT from the second
+ * open() to the caller.
+ *
+ * If the caller wants to open a preexistent file, then the first
+ * open() is decisive and its third argument is ignored, and the second
+ * open() and the fchmod() are never called.
+ */
+ fd = open(path, oflag | ((oflag & O_CREAT) ? O_EXCL : 0), 0);
+ if (fd == -1 && errno == EEXIST) {
+ oflag &= ~(unsigned)O_CREAT;
+ fd = open(path, oflag);
+ }
+
+ if (fd == -1) {
+ error_setg_errno(&local_err, errno, "failed to open file '%s' "
+ "(mode: '%s')", path, mode);
+ } else {
+ qemu_set_cloexec(fd);
+
+ if ((oflag & O_CREAT) && fchmod(fd, DEFAULT_NEW_FILE_MODE) == -1) {
+ error_setg_errno(&local_err, errno, "failed to set permission "
+ "0%03o on new file '%s' (mode: '%s')",
+ (unsigned)DEFAULT_NEW_FILE_MODE, path, mode);
+ } else {
+ FILE *f;
+
+ f = fdopen(fd, mode);
+ if (f == NULL) {
+ error_setg_errno(&local_err, errno, "failed to associate "
+ "stdio stream with file descriptor %d, "
+ "file '%s' (mode: '%s')", fd, path, mode);
+ } else {
+ return f;
+ }
+ }
+
+ close(fd);
+ if (oflag & O_CREAT) {
+ unlink(path);
+ }
+ }
+ }
+
+ error_propagate(errp, local_err);
+ return NULL;
+}
+
+int64_t qmp_guest_file_open(const char *path, bool has_mode, const char *mode,
+ Error **errp)
{
FILE *fh;
+ Error *local_err = NULL;
int fd;
int64_t ret = -1, handle;
mode = "r";
}
slog("guest-file-open called, filepath: %s, mode: %s", path, mode);
- fh = fopen(path, mode);
- if (!fh) {
- error_setg_errno(err, errno, "failed to open file '%s' (mode: '%s')",
- path, mode);
+ fh = safe_open_or_create(path, mode, &local_err);
+ if (local_err != NULL) {
+ error_propagate(errp, local_err);
return -1;
}
ret = fcntl(fd, F_GETFL);
ret = fcntl(fd, F_SETFL, ret | O_NONBLOCK);
if (ret == -1) {
- error_setg_errno(err, errno, "failed to make file '%s' non-blocking",
+ error_setg_errno(errp, errno, "failed to make file '%s' non-blocking",
path);
fclose(fh);
return -1;
}
- handle = guest_file_handle_add(fh, err);
- if (error_is_set(err)) {
+ handle = guest_file_handle_add(fh, errp);
+ if (handle < 0) {
fclose(fh);
return -1;
}
- slog("guest-file-open, handle: %d", handle);
+ slog("guest-file-open, handle: %" PRId64, handle);
return handle;
}
-void qmp_guest_file_close(int64_t handle, Error **err)
+void qmp_guest_file_close(int64_t handle, Error **errp)
{
- GuestFileHandle *gfh = guest_file_handle_find(handle, err);
+ GuestFileHandle *gfh = guest_file_handle_find(handle, errp);
int ret;
- slog("guest-file-close called, handle: %ld", handle);
+ slog("guest-file-close called, handle: %" PRId64, handle);
if (!gfh) {
return;
}
ret = fclose(gfh->fh);
if (ret == EOF) {
- error_setg_errno(err, errno, "failed to close handle");
+ error_setg_errno(errp, errno, "failed to close handle");
return;
}
}
struct GuestFileRead *qmp_guest_file_read(int64_t handle, bool has_count,
- int64_t count, Error **err)
+ int64_t count, Error **errp)
{
- GuestFileHandle *gfh = guest_file_handle_find(handle, err);
+ GuestFileHandle *gfh = guest_file_handle_find(handle, errp);
GuestFileRead *read_data = NULL;
guchar *buf;
FILE *fh;
if (!has_count) {
count = QGA_READ_COUNT_DEFAULT;
} else if (count < 0) {
- error_setg(err, "value '%" PRId64 "' is invalid for argument count",
+ error_setg(errp, "value '%" PRId64 "' is invalid for argument count",
count);
return NULL;
}
buf = g_malloc0(count+1);
read_count = fread(buf, 1, count, fh);
if (ferror(fh)) {
- error_setg_errno(err, errno, "failed to read file");
- slog("guest-file-read failed, handle: %ld", handle);
+ error_setg_errno(errp, errno, "failed to read file");
+ slog("guest-file-read failed, handle: %" PRId64, handle);
} else {
buf[read_count] = 0;
read_data = g_malloc0(sizeof(GuestFileRead));
}
GuestFileWrite *qmp_guest_file_write(int64_t handle, const char *buf_b64,
- bool has_count, int64_t count, Error **err)
+ bool has_count, int64_t count,
+ Error **errp)
{
GuestFileWrite *write_data = NULL;
guchar *buf;
gsize buf_len;
int write_count;
- GuestFileHandle *gfh = guest_file_handle_find(handle, err);
+ GuestFileHandle *gfh = guest_file_handle_find(handle, errp);
FILE *fh;
if (!gfh) {
if (!has_count) {
count = buf_len;
} else if (count < 0 || count > buf_len) {
- error_setg(err, "value '%" PRId64 "' is invalid for argument count",
+ error_setg(errp, "value '%" PRId64 "' is invalid for argument count",
count);
g_free(buf);
return NULL;
write_count = fwrite(buf, 1, count, fh);
if (ferror(fh)) {
- error_setg_errno(err, errno, "failed to write to file");
- slog("guest-file-write failed, handle: %ld", handle);
+ error_setg_errno(errp, errno, "failed to write to file");
+ slog("guest-file-write failed, handle: %" PRId64, handle);
} else {
write_data = g_malloc0(sizeof(GuestFileWrite));
write_data->count = write_count;
}
struct GuestFileSeek *qmp_guest_file_seek(int64_t handle, int64_t offset,
- int64_t whence, Error **err)
+ int64_t whence, Error **errp)
{
- GuestFileHandle *gfh = guest_file_handle_find(handle, err);
+ GuestFileHandle *gfh = guest_file_handle_find(handle, errp);
GuestFileSeek *seek_data = NULL;
FILE *fh;
int ret;
fh = gfh->fh;
ret = fseek(fh, offset, whence);
if (ret == -1) {
- error_setg_errno(err, errno, "failed to seek file");
+ error_setg_errno(errp, errno, "failed to seek file");
} else {
- seek_data = g_malloc0(sizeof(GuestFileRead));
+ seek_data = g_new0(GuestFileSeek, 1);
seek_data->position = ftell(fh);
seek_data->eof = feof(fh);
}
return seek_data;
}
-void qmp_guest_file_flush(int64_t handle, Error **err)
+void qmp_guest_file_flush(int64_t handle, Error **errp)
{
- GuestFileHandle *gfh = guest_file_handle_find(handle, err);
+ GuestFileHandle *gfh = guest_file_handle_find(handle, errp);
FILE *fh;
int ret;
fh = gfh->fh;
ret = fflush(fh);
if (ret == EOF) {
- error_setg_errno(err, errno, "failed to flush file");
+ error_setg_errno(errp, errno, "failed to flush file");
}
}
QTAILQ_ENTRY(FsMount) next;
} FsMount;
-typedef QTAILQ_HEAD(, FsMount) FsMountList;
+typedef QTAILQ_HEAD(FsMountList, FsMount) FsMountList;
static void free_fs_mount_list(FsMountList *mounts)
{
/*
* Walk the mount table and build a list of local file systems
*/
-static void build_fs_mount_list(FsMountList *mounts, Error **err)
+static void build_fs_mount_list(FsMountList *mounts, Error **errp)
{
struct mntent *ment;
FsMount *mount;
fp = setmntent(mtab, "r");
if (!fp) {
- error_setg(err, "failed to open mtab file: '%s'", mtab);
+ error_setg(errp, "failed to open mtab file: '%s'", mtab);
return;
}
FSFREEZE_HOOK_FREEZE,
} FsfreezeHookArg;
-const char *fsfreeze_hook_arg_string[] = {
+static const char *fsfreeze_hook_arg_string[] = {
"thaw",
"freeze",
};
-static void execute_fsfreeze_hook(FsfreezeHookArg arg, Error **err)
+static void execute_fsfreeze_hook(FsfreezeHookArg arg, Error **errp)
{
int status;
pid_t pid;
return;
}
if (access(hook, X_OK) != 0) {
- error_setg_errno(err, errno, "can't access fsfreeze hook '%s'", hook);
+ error_setg_errno(errp, errno, "can't access fsfreeze hook '%s'", hook);
return;
}
execle(hook, hook, arg_str, NULL, environ);
_exit(EXIT_FAILURE);
} else if (pid < 0) {
- error_setg_errno(err, errno, "failed to create child process");
+ 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(err, local_err);
+ if (local_err) {
+ error_propagate(errp, local_err);
return;
}
if (!WIFEXITED(status)) {
- error_setg(err, "fsfreeze hook has terminated abnormally");
+ error_setg(errp, "fsfreeze hook has terminated abnormally");
return;
}
status = WEXITSTATUS(status);
if (status) {
- error_setg(err, "fsfreeze hook has failed with status %d", status);
+ error_setg(errp, "fsfreeze hook has failed with status %d", status);
return;
}
}
/*
* Return status of freeze/thaw
*/
-GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **err)
+GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **errp)
{
if (ga_is_frozen(ga_state)) {
return GUEST_FSFREEZE_STATUS_FROZEN;
* Walk list of mounted file systems in the guest, and freeze the ones which
* are real local file systems.
*/
-int64_t qmp_guest_fsfreeze_freeze(Error **err)
+int64_t qmp_guest_fsfreeze_freeze(Error **errp)
{
int ret = 0, i = 0;
FsMountList mounts;
slog("guest-fsfreeze called");
execute_fsfreeze_hook(FSFREEZE_HOOK_FREEZE, &local_err);
- if (error_is_set(&local_err)) {
- error_propagate(err, local_err);
+ if (local_err) {
+ error_propagate(errp, local_err);
return -1;
}
QTAILQ_INIT(&mounts);
build_fs_mount_list(&mounts, &local_err);
- if (error_is_set(&local_err)) {
- error_propagate(err, local_err);
+ if (local_err) {
+ error_propagate(errp, local_err);
return -1;
}
/* cannot risk guest agent blocking itself on a write in this state */
ga_set_frozen(ga_state);
- QTAILQ_FOREACH(mount, &mounts, next) {
+ QTAILQ_FOREACH_REVERSE(mount, &mounts, FsMountList, next) {
fd = qemu_open(mount->dirname, O_RDONLY);
if (fd == -1) {
- error_setg_errno(err, errno, "failed to open %s", mount->dirname);
+ error_setg_errno(errp, errno, "failed to open %s", mount->dirname);
goto error;
}
ret = ioctl(fd, FIFREEZE);
if (ret == -1) {
if (errno != EOPNOTSUPP) {
- error_setg_errno(err, errno, "failed to freeze %s",
+ error_setg_errno(errp, errno, "failed to freeze %s",
mount->dirname);
close(fd);
goto error;
/*
* Walk list of frozen file systems in the guest, and thaw them.
*/
-int64_t qmp_guest_fsfreeze_thaw(Error **err)
+int64_t qmp_guest_fsfreeze_thaw(Error **errp)
{
int ret;
FsMountList mounts;
QTAILQ_INIT(&mounts);
build_fs_mount_list(&mounts, &local_err);
- if (error_is_set(&local_err)) {
- error_propagate(err, local_err);
+ if (local_err) {
+ error_propagate(errp, local_err);
return 0;
}
ga_unset_frozen(ga_state);
free_fs_mount_list(&mounts);
- execute_fsfreeze_hook(FSFREEZE_HOOK_THAW, err);
+ execute_fsfreeze_hook(FSFREEZE_HOOK_THAW, errp);
return i;
}
/*
* Walk list of mounted file systems in the guest, and trim them.
*/
-void qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **err)
+void qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **errp)
{
int ret = 0;
FsMountList mounts;
QTAILQ_INIT(&mounts);
build_fs_mount_list(&mounts, &local_err);
- if (error_is_set(&local_err)) {
- error_propagate(err, local_err);
+ if (local_err) {
+ error_propagate(errp, local_err);
return;
}
QTAILQ_FOREACH(mount, &mounts, next) {
fd = qemu_open(mount->dirname, O_RDONLY);
if (fd == -1) {
- error_setg_errno(err, errno, "failed to open %s", mount->dirname);
+ error_setg_errno(errp, errno, "failed to open %s", mount->dirname);
goto error;
}
ret = ioctl(fd, FITRIM, &r);
if (ret == -1) {
if (errno != ENOTTY && errno != EOPNOTSUPP) {
- error_setg_errno(err, errno, "failed to trim %s",
+ error_setg_errno(errp, errno, "failed to trim %s",
mount->dirname);
close(fd);
goto error;
#define SUSPEND_NOT_SUPPORTED 1
static void bios_supports_mode(const char *pmutils_bin, const char *pmutils_arg,
- const char *sysfile_str, Error **err)
+ const char *sysfile_str, Error **errp)
{
Error *local_err = NULL;
char *pmutils_path;
_exit(SUSPEND_NOT_SUPPORTED);
} else if (pid < 0) {
- error_setg_errno(err, errno, "failed to create child process");
+ error_setg_errno(errp, errno, "failed to create child process");
goto out;
}
ga_wait_child(pid, &status, &local_err);
- if (error_is_set(&local_err)) {
- error_propagate(err, local_err);
+ if (local_err) {
+ error_propagate(errp, local_err);
goto out;
}
if (!WIFEXITED(status)) {
- error_setg(err, "child process has terminated abnormally");
+ error_setg(errp, "child process has terminated abnormally");
goto out;
}
case SUSPEND_SUPPORTED:
goto out;
case SUSPEND_NOT_SUPPORTED:
- error_setg(err,
+ error_setg(errp,
"the requested suspend mode is not supported by the guest");
goto out;
default:
- error_setg(err,
+ error_setg(errp,
"the helper program '%s' returned an unexpected exit status"
" code (%d)", pmutils_path, WEXITSTATUS(status));
goto out;
}
static void guest_suspend(const char *pmutils_bin, const char *sysfile_str,
- Error **err)
+ Error **errp)
{
Error *local_err = NULL;
char *pmutils_path;
_exit(EXIT_SUCCESS);
} else if (pid < 0) {
- error_setg_errno(err, errno, "failed to create child process");
+ error_setg_errno(errp, errno, "failed to create child process");
goto out;
}
ga_wait_child(pid, &status, &local_err);
- if (error_is_set(&local_err)) {
- error_propagate(err, local_err);
+ if (local_err) {
+ error_propagate(errp, local_err);
goto out;
}
if (!WIFEXITED(status)) {
- error_setg(err, "child process has terminated abnormally");
+ error_setg(errp, "child process has terminated abnormally");
goto out;
}
if (WEXITSTATUS(status)) {
- error_setg(err, "child process has failed to suspend");
+ error_setg(errp, "child process has failed to suspend");
goto out;
}
g_free(pmutils_path);
}
-void qmp_guest_suspend_disk(Error **err)
+void qmp_guest_suspend_disk(Error **errp)
{
- bios_supports_mode("pm-is-supported", "--hibernate", "disk", err);
- if (error_is_set(err)) {
+ Error *local_err = NULL;
+
+ bios_supports_mode("pm-is-supported", "--hibernate", "disk", &local_err);
+ if (local_err) {
+ error_propagate(errp, local_err);
return;
}
- guest_suspend("pm-hibernate", "disk", err);
+ guest_suspend("pm-hibernate", "disk", errp);
}
-void qmp_guest_suspend_ram(Error **err)
+void qmp_guest_suspend_ram(Error **errp)
{
- bios_supports_mode("pm-is-supported", "--suspend", "mem", err);
- if (error_is_set(err)) {
+ Error *local_err = NULL;
+
+ bios_supports_mode("pm-is-supported", "--suspend", "mem", &local_err);
+ if (local_err) {
+ error_propagate(errp, local_err);
return;
}
- guest_suspend("pm-suspend", "mem", err);
+ guest_suspend("pm-suspend", "mem", errp);
}
-void qmp_guest_suspend_hybrid(Error **err)
+void qmp_guest_suspend_hybrid(Error **errp)
{
- bios_supports_mode("pm-is-supported", "--suspend-hybrid", NULL, err);
- if (error_is_set(err)) {
+ Error *local_err = NULL;
+
+ bios_supports_mode("pm-is-supported", "--suspend-hybrid", NULL,
+ &local_err);
+ if (local_err) {
+ error_propagate(errp, local_err);
return;
}
- guest_suspend("pm-suspend-hybrid", NULL, err);
+ guest_suspend("pm-suspend-hybrid", NULL, errp);
}
static GuestNetworkInterfaceList *
return NULL;
}
+#define SYSCONF_EXACT(name, errp) sysconf_exact((name), #name, (errp))
+
+static long sysconf_exact(int name, const char *name_str, Error **errp)
+{
+ long ret;
+
+ errno = 0;
+ ret = sysconf(name);
+ if (ret == -1) {
+ if (errno == 0) {
+ error_setg(errp, "sysconf(%s): value indefinite", name_str);
+ } else {
+ error_setg_errno(errp, 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)
+void qmp_guest_suspend_disk(Error **errp)
{
- error_set(err, QERR_UNSUPPORTED);
+ error_set(errp, QERR_UNSUPPORTED);
}
-void qmp_guest_suspend_ram(Error **err)
+void qmp_guest_suspend_ram(Error **errp)
{
- error_set(err, QERR_UNSUPPORTED);
+ error_set(errp, QERR_UNSUPPORTED);
}
-void qmp_guest_suspend_hybrid(Error **err)
+void qmp_guest_suspend_hybrid(Error **errp)
{
- error_set(err, QERR_UNSUPPORTED);
+ error_set(errp, QERR_UNSUPPORTED);
}
GuestNetworkInterfaceList *qmp_guest_network_get_interfaces(Error **errp)
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)
-GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **err)
+GuestFsfreezeStatus qmp_guest_fsfreeze_status(Error **errp)
{
- error_set(err, QERR_UNSUPPORTED);
+ error_set(errp, QERR_UNSUPPORTED);
return 0;
}
-int64_t qmp_guest_fsfreeze_freeze(Error **err)
+int64_t qmp_guest_fsfreeze_freeze(Error **errp)
{
- error_set(err, QERR_UNSUPPORTED);
+ error_set(errp, QERR_UNSUPPORTED);
return 0;
}
-int64_t qmp_guest_fsfreeze_thaw(Error **err)
+int64_t qmp_guest_fsfreeze_thaw(Error **errp)
{
- error_set(err, QERR_UNSUPPORTED);
+ error_set(errp, QERR_UNSUPPORTED);
return 0;
}
#endif /* CONFIG_FSFREEZE */
#if !defined(CONFIG_FSTRIM)
-void qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **err)
+void qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **errp)
{
- error_set(err, QERR_UNSUPPORTED);
+ error_set(errp, QERR_UNSUPPORTED);
}
#endif
projects / qemu.git / blobdiff