#include <glib.h>
#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 "qerror.h"
-#include "qemu-queue.h"
-#include "host-utils.h"
+#include "qapi/qmp/qerror.h"
+#include "qemu/queue.h"
+#include "qemu/host-utils.h"
+
+#ifndef CONFIG_HAS_ENVIRON
+#ifdef __APPLE__
+#include <crt_externs.h>
+#define environ (*_NSGetEnviron())
+#else
+extern char **environ;
+#endif
+#endif
#if defined(__linux__)
#include <mntent.h>
#include <arpa/inet.h>
#include <sys/socket.h>
#include <net/if.h>
-#include <sys/wait.h>
-#if defined(__linux__) && defined(FIFREEZE)
+#ifdef FIFREEZE
#define CONFIG_FSFREEZE
#endif
+#ifdef FITRIM
+#define CONFIG_FSTRIM
+#endif
#endif
-#if defined(__linux__)
-/* TODO: use this in place of all post-fork() fclose(std*) callers */
-static void reopen_fd_to_null(int fd)
+static void ga_wait_child(pid_t pid, int *status, Error **err)
{
- int nullfd;
+ pid_t rpid;
- nullfd = open("/dev/null", O_RDWR);
- if (nullfd < 0) {
- return;
- }
+ *status = 0;
- dup2(nullfd, fd);
+ do {
+ rpid = waitpid(pid, status, 0);
+ } while (rpid == -1 && errno == EINTR);
- if (nullfd != fd) {
- close(nullfd);
+ if (rpid == -1) {
+ error_setg_errno(err, errno, "failed to wait for child (pid: %d)", pid);
+ return;
}
+
+ g_assert(rpid == pid);
}
-#endif /* defined(__linux__) */
void qmp_guest_shutdown(bool has_mode, const char *mode, Error **err)
{
- int ret;
const char *shutdown_flag;
+ Error *local_err = NULL;
+ pid_t pid;
+ int status;
slog("guest-shutdown called, mode: %s", mode);
if (!has_mode || strcmp(mode, "powerdown") == 0) {
} else if (strcmp(mode, "reboot") == 0) {
shutdown_flag = "-r";
} else {
- error_set(err, QERR_INVALID_PARAMETER_VALUE, "mode",
- "halt|powerdown|reboot");
+ error_setg(err,
+ "mode is invalid (valid values are: halt|powerdown|reboot");
return;
}
- ret = fork();
- if (ret == 0) {
+ pid = fork();
+ if (pid == 0) {
/* child, start the shutdown */
setsid();
- fclose(stdin);
- fclose(stdout);
- fclose(stderr);
+ reopen_fd_to_null(0);
+ reopen_fd_to_null(1);
+ reopen_fd_to_null(2);
- ret = execl("/sbin/shutdown", "shutdown", shutdown_flag, "+0",
- "hypervisor initiated shutdown", (char*)NULL);
- if (ret) {
- slog("guest-shutdown failed: %s", strerror(errno));
- }
- exit(!!ret);
- } else if (ret < 0) {
- error_set(err, QERR_UNDEFINED_ERROR);
+ execle("/sbin/shutdown", "shutdown", 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");
+ return;
+ }
+
+ ga_wait_child(pid, &status, &local_err);
+ if (error_is_set(&local_err)) {
+ error_propagate(err, local_err);
+ return;
+ }
+
+ if (!WIFEXITED(status)) {
+ error_setg(err, "child process has terminated abnormally");
+ return;
+ }
+
+ if (WEXITSTATUS(status)) {
+ error_setg(err, "child process has failed to shutdown");
+ return;
+ }
+
+ /* 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;
}
}
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)
+static GuestFileHandle *guest_file_handle_find(int64_t id, Error **err)
{
GuestFileHandle *gfh;
}
}
+ error_setg(err, "handle '%" PRId64 "' has not been found", id);
+ return NULL;
+}
+
+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 **err)
+{
+ 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(err, "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 **err)
+{
+ 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(err, local_err);
return NULL;
}
int64_t qmp_guest_file_open(const char *path, bool has_mode, const char *mode, Error **err)
{
FILE *fh;
+ Error *local_err = NULL;
int fd;
- int64_t ret = -1;
+ int64_t ret = -1, handle;
if (!has_mode) {
mode = "r";
}
slog("guest-file-open called, filepath: %s, mode: %s", path, mode);
- fh = fopen(path, mode);
- if (!fh) {
- error_set(err, QERR_OPEN_FILE_FAILED, path);
+ fh = safe_open_or_create(path, mode, &local_err);
+ if (local_err != NULL) {
+ error_propagate(err, local_err);
return -1;
}
ret = fcntl(fd, F_GETFL);
ret = fcntl(fd, F_SETFL, ret | O_NONBLOCK);
if (ret == -1) {
- error_set(err, QERR_QGA_COMMAND_FAILED, "fcntl() failed");
+ error_setg_errno(err, 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)) {
fclose(fh);
return -1;
}
- guest_file_handle_add(fh);
- slog("guest-file-open, handle: %d", fd);
- return fd;
+ slog("guest-file-open, handle: %d", handle);
+ return handle;
}
void qmp_guest_file_close(int64_t handle, Error **err)
{
- GuestFileHandle *gfh = guest_file_handle_find(handle);
+ GuestFileHandle *gfh = guest_file_handle_find(handle, err);
int ret;
slog("guest-file-close called, handle: %ld", handle);
if (!gfh) {
- error_set(err, QERR_FD_NOT_FOUND, "handle");
return;
}
ret = fclose(gfh->fh);
- if (ret == -1) {
- error_set(err, QERR_QGA_COMMAND_FAILED, "fclose() failed");
+ if (ret == EOF) {
+ error_setg_errno(err, errno, "failed to close handle");
return;
}
struct GuestFileRead *qmp_guest_file_read(int64_t handle, bool has_count,
int64_t count, Error **err)
{
- GuestFileHandle *gfh = guest_file_handle_find(handle);
+ GuestFileHandle *gfh = guest_file_handle_find(handle, err);
GuestFileRead *read_data = NULL;
guchar *buf;
FILE *fh;
size_t read_count;
if (!gfh) {
- error_set(err, QERR_FD_NOT_FOUND, "handle");
return NULL;
}
if (!has_count) {
count = QGA_READ_COUNT_DEFAULT;
} else if (count < 0) {
- error_set(err, QERR_INVALID_PARAMETER, "count");
+ error_setg(err, "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_set(err, QERR_QGA_COMMAND_FAILED, "fread() failed");
} else {
buf[read_count] = 0;
read_data = g_malloc0(sizeof(GuestFileRead));
guchar *buf;
gsize buf_len;
int write_count;
- GuestFileHandle *gfh = guest_file_handle_find(handle);
+ GuestFileHandle *gfh = guest_file_handle_find(handle, err);
FILE *fh;
if (!gfh) {
- error_set(err, QERR_FD_NOT_FOUND, "handle");
return NULL;
}
if (!has_count) {
count = buf_len;
} else if (count < 0 || count > buf_len) {
+ error_setg(err, "value '%" PRId64 "' is invalid for argument count",
+ count);
g_free(buf);
- error_set(err, QERR_INVALID_PARAMETER, "count");
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_set(err, QERR_QGA_COMMAND_FAILED, "fwrite() error");
} 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)
{
- GuestFileHandle *gfh = guest_file_handle_find(handle);
+ GuestFileHandle *gfh = guest_file_handle_find(handle, err);
GuestFileSeek *seek_data = NULL;
FILE *fh;
int ret;
if (!gfh) {
- error_set(err, QERR_FD_NOT_FOUND, "handle");
return NULL;
}
fh = gfh->fh;
ret = fseek(fh, offset, whence);
if (ret == -1) {
- error_set(err, QERR_QGA_COMMAND_FAILED, strerror(errno));
+ error_setg_errno(err, errno, "failed to seek file");
} else {
seek_data = g_malloc0(sizeof(GuestFileRead));
seek_data->position = ftell(fh);
void qmp_guest_file_flush(int64_t handle, Error **err)
{
- GuestFileHandle *gfh = guest_file_handle_find(handle);
+ GuestFileHandle *gfh = guest_file_handle_find(handle, err);
FILE *fh;
int ret;
if (!gfh) {
- error_set(err, QERR_FD_NOT_FOUND, "handle");
return;
}
fh = gfh->fh;
ret = fflush(fh);
if (ret == EOF) {
- error_set(err, QERR_QGA_COMMAND_FAILED, strerror(errno));
+ error_setg_errno(err, errno, "failed to flush file");
}
}
/* linux-specific implementations. avoid this if at all possible. */
#if defined(__linux__)
-#if defined(CONFIG_FSFREEZE)
-
-typedef struct GuestFsfreezeMount {
+#if defined(CONFIG_FSFREEZE) || defined(CONFIG_FSTRIM)
+typedef struct FsMount {
char *dirname;
char *devtype;
- QTAILQ_ENTRY(GuestFsfreezeMount) next;
-} GuestFsfreezeMount;
+ QTAILQ_ENTRY(FsMount) next;
+} FsMount;
-typedef QTAILQ_HEAD(, GuestFsfreezeMount) GuestFsfreezeMountList;
+typedef QTAILQ_HEAD(, FsMount) FsMountList;
-static void guest_fsfreeze_free_mount_list(GuestFsfreezeMountList *mounts)
+static void free_fs_mount_list(FsMountList *mounts)
{
- GuestFsfreezeMount *mount, *temp;
+ FsMount *mount, *temp;
if (!mounts) {
return;
/*
* Walk the mount table and build a list of local file systems
*/
-static int guest_fsfreeze_build_mount_list(GuestFsfreezeMountList *mounts)
+static void build_fs_mount_list(FsMountList *mounts, Error **err)
{
struct mntent *ment;
- GuestFsfreezeMount *mount;
- char const *mtab = MOUNTED;
+ FsMount *mount;
+ char const *mtab = "/proc/self/mounts";
FILE *fp;
fp = setmntent(mtab, "r");
if (!fp) {
- g_warning("fsfreeze: unable to read mtab");
- return -1;
+ error_setg(err, "failed to open mtab file: '%s'", mtab);
+ return;
}
while ((ment = getmntent(fp))) {
continue;
}
- mount = g_malloc0(sizeof(GuestFsfreezeMount));
+ mount = g_malloc0(sizeof(FsMount));
mount->dirname = g_strdup(ment->mnt_dir);
mount->devtype = g_strdup(ment->mnt_type);
}
endmntent(fp);
+}
+#endif
- return 0;
+#if defined(CONFIG_FSFREEZE)
+
+typedef enum {
+ FSFREEZE_HOOK_THAW = 0,
+ FSFREEZE_HOOK_FREEZE,
+} FsfreezeHookArg;
+
+const char *fsfreeze_hook_arg_string[] = {
+ "thaw",
+ "freeze",
+};
+
+static void execute_fsfreeze_hook(FsfreezeHookArg arg, Error **err)
+{
+ int status;
+ pid_t pid;
+ const char *hook;
+ const char *arg_str = fsfreeze_hook_arg_string[arg];
+ Error *local_err = NULL;
+
+ hook = ga_fsfreeze_hook(ga_state);
+ if (!hook) {
+ return;
+ }
+ if (access(hook, X_OK) != 0) {
+ error_setg_errno(err, errno, "can't access fsfreeze hook '%s'", hook);
+ return;
+ }
+
+ slog("executing fsfreeze hook with arg '%s'", arg_str);
+ pid = fork();
+ if (pid == 0) {
+ setsid();
+ reopen_fd_to_null(0);
+ reopen_fd_to_null(1);
+ reopen_fd_to_null(2);
+
+ execle(hook, hook, arg_str, NULL, environ);
+ _exit(EXIT_FAILURE);
+ } else if (pid < 0) {
+ error_setg_errno(err, 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);
+ return;
+ }
+
+ if (!WIFEXITED(status)) {
+ error_setg(err, "fsfreeze hook has terminated abnormally");
+ return;
+ }
+
+ status = WEXITSTATUS(status);
+ if (status) {
+ error_setg(err, "fsfreeze hook has failed with status %d", status);
+ return;
+ }
}
/*
int64_t qmp_guest_fsfreeze_freeze(Error **err)
{
int ret = 0, i = 0;
- GuestFsfreezeMountList mounts;
- struct GuestFsfreezeMount *mount;
+ FsMountList mounts;
+ struct FsMount *mount;
+ Error *local_err = NULL;
int fd;
- char err_msg[512];
slog("guest-fsfreeze called");
+ execute_fsfreeze_hook(FSFREEZE_HOOK_FREEZE, &local_err);
+ if (error_is_set(&local_err)) {
+ error_propagate(err, local_err);
+ return -1;
+ }
+
QTAILQ_INIT(&mounts);
- ret = guest_fsfreeze_build_mount_list(&mounts);
- if (ret < 0) {
- return ret;
+ build_fs_mount_list(&mounts, &local_err);
+ if (error_is_set(&local_err)) {
+ error_propagate(err, local_err);
+ return -1;
}
/* cannot risk guest agent blocking itself on a write in this state */
QTAILQ_FOREACH(mount, &mounts, next) {
fd = qemu_open(mount->dirname, O_RDONLY);
if (fd == -1) {
- sprintf(err_msg, "failed to open %s, %s", mount->dirname,
- strerror(errno));
- error_set(err, QERR_QGA_COMMAND_FAILED, err_msg);
+ error_setg_errno(err, errno, "failed to open %s", mount->dirname);
goto error;
}
ret = ioctl(fd, FIFREEZE);
if (ret == -1) {
if (errno != EOPNOTSUPP) {
- sprintf(err_msg, "failed to freeze %s, %s",
- mount->dirname, strerror(errno));
- error_set(err, QERR_QGA_COMMAND_FAILED, err_msg);
+ error_setg_errno(err, errno, "failed to freeze %s",
+ mount->dirname);
close(fd);
goto error;
}
close(fd);
}
- guest_fsfreeze_free_mount_list(&mounts);
+ free_fs_mount_list(&mounts);
return i;
error:
- guest_fsfreeze_free_mount_list(&mounts);
+ free_fs_mount_list(&mounts);
qmp_guest_fsfreeze_thaw(NULL);
return 0;
}
int64_t qmp_guest_fsfreeze_thaw(Error **err)
{
int ret;
- GuestFsfreezeMountList mounts;
- GuestFsfreezeMount *mount;
+ FsMountList mounts;
+ FsMount *mount;
int fd, i = 0, logged;
+ Error *local_err = NULL;
QTAILQ_INIT(&mounts);
- ret = guest_fsfreeze_build_mount_list(&mounts);
- if (ret) {
- error_set(err, QERR_QGA_COMMAND_FAILED,
- "failed to enumerate filesystems");
+ build_fs_mount_list(&mounts, &local_err);
+ if (error_is_set(&local_err)) {
+ error_propagate(err, local_err);
return 0;
}
* was returned the filesystem was *not* unfrozen by that particular
* call.
*
- * since multiple preceeding FIFREEZEs require multiple calls to FITHAW
+ * since multiple preceding FIFREEZEs require multiple calls to FITHAW
* to unfreeze, continuing issuing FITHAW until an error is returned,
* in which case either the filesystem is in an unfreezable state, or,
* more likely, it was thawed previously (and remains so afterward).
}
ga_unset_frozen(ga_state);
- guest_fsfreeze_free_mount_list(&mounts);
+ free_fs_mount_list(&mounts);
+
+ execute_fsfreeze_hook(FSFREEZE_HOOK_THAW, err);
+
return i;
}
static void guest_fsfreeze_cleanup(void)
{
- int64_t ret;
Error *err = NULL;
if (ga_is_frozen(ga_state) == GUEST_FSFREEZE_STATUS_FROZEN) {
- ret = qmp_guest_fsfreeze_thaw(&err);
- if (ret < 0 || err) {
- slog("failed to clean up frozen filesystems");
+ qmp_guest_fsfreeze_thaw(&err);
+ if (err) {
+ slog("failed to clean up frozen filesystems: %s",
+ error_get_pretty(err));
+ error_free(err);
}
}
}
#endif /* CONFIG_FSFREEZE */
+#if defined(CONFIG_FSTRIM)
+/*
+ * Walk list of mounted file systems in the guest, and trim them.
+ */
+void qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **err)
+{
+ int ret = 0;
+ FsMountList mounts;
+ struct FsMount *mount;
+ int fd;
+ Error *local_err = NULL;
+ struct fstrim_range r = {
+ .start = 0,
+ .len = -1,
+ .minlen = has_minimum ? minimum : 0,
+ };
+
+ slog("guest-fstrim called");
+
+ QTAILQ_INIT(&mounts);
+ build_fs_mount_list(&mounts, &local_err);
+ if (error_is_set(&local_err)) {
+ error_propagate(err, 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);
+ goto error;
+ }
+
+ /* We try to cull filesytems we know won't work in advance, but other
+ * filesytems may not implement fstrim for less obvious reasons. These
+ * will report EOPNOTSUPP; we simply ignore these errors. Any other
+ * error means an unexpected error, so return it in those cases. In
+ * some other cases ENOTTY will be reported (e.g. CD-ROMs).
+ */
+ ret = ioctl(fd, FITRIM, &r);
+ if (ret == -1) {
+ if (errno != ENOTTY && errno != EOPNOTSUPP) {
+ error_setg_errno(err, errno, "failed to trim %s",
+ mount->dirname);
+ close(fd);
+ goto error;
+ }
+ }
+ close(fd);
+ }
+
+error:
+ free_fs_mount_list(&mounts);
+}
+#endif /* CONFIG_FSTRIM */
+
+
#define LINUX_SYS_STATE_FILE "/sys/power/state"
#define SUSPEND_SUPPORTED 0
#define SUSPEND_NOT_SUPPORTED 1
-/**
- * This function forks twice and the information about the mode support
- * status is passed to the qemu-ga process via a pipe.
- *
- * This approach allows us to keep the way we reap terminated children
- * in qemu-ga quite simple.
- */
static void bios_supports_mode(const char *pmutils_bin, const char *pmutils_arg,
const char *sysfile_str, Error **err)
{
- pid_t pid;
- ssize_t ret;
+ Error *local_err = NULL;
char *pmutils_path;
- int status, pipefds[2];
-
- if (pipe(pipefds) < 0) {
- error_set(err, QERR_UNDEFINED_ERROR);
- return;
- }
+ pid_t pid;
+ int status;
pmutils_path = g_find_program_in_path(pmutils_bin);
pid = fork();
if (!pid) {
- struct sigaction act;
-
- memset(&act, 0, sizeof(act));
- act.sa_handler = SIG_DFL;
- sigaction(SIGCHLD, &act, NULL);
+ char buf[32]; /* hopefully big enough */
+ ssize_t ret;
+ int fd;
setsid();
- close(pipefds[0]);
reopen_fd_to_null(0);
reopen_fd_to_null(1);
reopen_fd_to_null(2);
- pid = fork();
- if (!pid) {
- int fd;
- char buf[32]; /* hopefully big enough */
-
- if (pmutils_path) {
- execle(pmutils_path, pmutils_bin, pmutils_arg, NULL, environ);
- }
-
- /*
- * If we get here either pm-utils is not installed or execle() has
- * failed. Let's try the manual method if the caller wants it.
- */
-
- if (!sysfile_str) {
- _exit(SUSPEND_NOT_SUPPORTED);
- }
-
- fd = open(LINUX_SYS_STATE_FILE, O_RDONLY);
- if (fd < 0) {
- _exit(SUSPEND_NOT_SUPPORTED);
- }
+ if (pmutils_path) {
+ execle(pmutils_path, pmutils_bin, pmutils_arg, NULL, environ);
+ }
- ret = read(fd, buf, sizeof(buf)-1);
- if (ret <= 0) {
- _exit(SUSPEND_NOT_SUPPORTED);
- }
- buf[ret] = '\0';
+ /*
+ * If we get here either pm-utils is not installed or execle() has
+ * failed. Let's try the manual method if the caller wants it.
+ */
- if (strstr(buf, sysfile_str)) {
- _exit(SUSPEND_SUPPORTED);
- }
+ if (!sysfile_str) {
+ _exit(SUSPEND_NOT_SUPPORTED);
+ }
+ fd = open(LINUX_SYS_STATE_FILE, O_RDONLY);
+ if (fd < 0) {
_exit(SUSPEND_NOT_SUPPORTED);
}
- if (pid > 0) {
- wait(&status);
- } else {
- status = SUSPEND_NOT_SUPPORTED;
+ ret = read(fd, buf, sizeof(buf)-1);
+ if (ret <= 0) {
+ _exit(SUSPEND_NOT_SUPPORTED);
}
+ buf[ret] = '\0';
- ret = write(pipefds[1], &status, sizeof(status));
- if (ret != sizeof(status)) {
- _exit(EXIT_FAILURE);
+ if (strstr(buf, sysfile_str)) {
+ _exit(SUSPEND_SUPPORTED);
}
- _exit(EXIT_SUCCESS);
+ _exit(SUSPEND_NOT_SUPPORTED);
+ } else if (pid < 0) {
+ error_setg_errno(err, errno, "failed to create child process");
+ goto out;
}
- close(pipefds[1]);
- g_free(pmutils_path);
-
- if (pid < 0) {
- error_set(err, QERR_UNDEFINED_ERROR);
+ ga_wait_child(pid, &status, &local_err);
+ if (error_is_set(&local_err)) {
+ error_propagate(err, local_err);
goto out;
}
- ret = read(pipefds[0], &status, sizeof(status));
- if (ret == sizeof(status) && WIFEXITED(status) &&
- WEXITSTATUS(status) == SUSPEND_SUPPORTED) {
- goto out;
+ if (!WIFEXITED(status)) {
+ error_setg(err, "child process has terminated abnormally");
+ goto out;
}
- error_set(err, QERR_UNSUPPORTED);
+ switch (WEXITSTATUS(status)) {
+ case SUSPEND_SUPPORTED:
+ goto out;
+ case SUSPEND_NOT_SUPPORTED:
+ error_setg(err,
+ "the requested suspend mode is not supported by the guest");
+ goto out;
+ default:
+ error_setg(err,
+ "the helper program '%s' returned an unexpected exit status"
+ " code (%d)", pmutils_path, WEXITSTATUS(status));
+ goto out;
+ }
out:
- close(pipefds[0]);
+ g_free(pmutils_path);
}
static void guest_suspend(const char *pmutils_bin, const char *sysfile_str,
Error **err)
{
- pid_t pid;
+ Error *local_err = NULL;
char *pmutils_path;
+ pid_t pid;
+ int status;
pmutils_path = g_find_program_in_path(pmutils_bin);
}
_exit(EXIT_SUCCESS);
+ } else if (pid < 0) {
+ error_setg_errno(err, errno, "failed to create child process");
+ goto out;
}
- g_free(pmutils_path);
+ ga_wait_child(pid, &status, &local_err);
+ if (error_is_set(&local_err)) {
+ error_propagate(err, local_err);
+ goto out;
+ }
- if (pid < 0) {
- error_set(err, QERR_UNDEFINED_ERROR);
- return;
+ if (!WIFEXITED(status)) {
+ error_setg(err, "child process has terminated abnormally");
+ goto out;
}
+
+ if (WEXITSTATUS(status)) {
+ error_setg(err, "child process has failed to suspend");
+ goto out;
+ }
+
+out:
+ g_free(pmutils_path);
}
void qmp_guest_suspend_disk(Error **err)
{
GuestNetworkInterfaceList *head = NULL, *cur_item = NULL;
struct ifaddrs *ifap, *ifa;
- char err_msg[512];
if (getifaddrs(&ifap) < 0) {
- snprintf(err_msg, sizeof(err_msg),
- "getifaddrs failed: %s", strerror(errno));
- error_set(errp, QERR_QGA_COMMAND_FAILED, err_msg);
+ error_setg_errno(errp, errno, "getifaddrs failed");
goto error;
}
/* we haven't obtained HW address yet */
sock = socket(PF_INET, SOCK_STREAM, 0);
if (sock == -1) {
- snprintf(err_msg, sizeof(err_msg),
- "failed to create socket: %s", strerror(errno));
- error_set(errp, QERR_QGA_COMMAND_FAILED, err_msg);
+ error_setg_errno(errp, errno, "failed to create socket");
goto error;
}
memset(&ifr, 0, sizeof(ifr));
- strncpy(ifr.ifr_name, info->value->name, IF_NAMESIZE);
+ pstrcpy(ifr.ifr_name, IF_NAMESIZE, info->value->name);
if (ioctl(sock, SIOCGIFHWADDR, &ifr) == -1) {
- snprintf(err_msg, sizeof(err_msg),
- "failed to get MAC addres of %s: %s",
- ifa->ifa_name,
- strerror(errno));
- error_set(errp, QERR_QGA_COMMAND_FAILED, err_msg);
+ error_setg_errno(errp, errno,
+ "failed to get MAC address of %s",
+ ifa->ifa_name);
+ close(sock);
goto error;
}
+ close(sock);
mac_addr = (unsigned char *) &ifr.ifr_hwaddr.sa_data;
- if (asprintf(&info->value->hardware_address,
- "%02x:%02x:%02x:%02x:%02x:%02x",
- (int) mac_addr[0], (int) mac_addr[1],
- (int) mac_addr[2], (int) mac_addr[3],
- (int) mac_addr[4], (int) mac_addr[5]) == -1) {
- snprintf(err_msg, sizeof(err_msg),
- "failed to format MAC: %s", strerror(errno));
- error_set(errp, QERR_QGA_COMMAND_FAILED, err_msg);
- goto error;
- }
+ info->value->hardware_address =
+ g_strdup_printf("%02x:%02x:%02x:%02x:%02x:%02x",
+ (int) mac_addr[0], (int) mac_addr[1],
+ (int) mac_addr[2], (int) mac_addr[3],
+ (int) mac_addr[4], (int) mac_addr[5]);
info->value->has_hardware_address = true;
- close(sock);
}
if (ifa->ifa_addr &&
ifa->ifa_addr->sa_family == AF_INET) {
/* interface with IPv4 address */
- address_item = g_malloc0(sizeof(*address_item));
- address_item->value = g_malloc0(sizeof(*address_item->value));
p = &((struct sockaddr_in *)ifa->ifa_addr)->sin_addr;
if (!inet_ntop(AF_INET, p, addr4, sizeof(addr4))) {
- snprintf(err_msg, sizeof(err_msg),
- "inet_ntop failed : %s", strerror(errno));
- error_set(errp, QERR_QGA_COMMAND_FAILED, err_msg);
+ error_setg_errno(errp, errno, "inet_ntop failed");
goto error;
}
+ address_item = g_malloc0(sizeof(*address_item));
+ address_item->value = g_malloc0(sizeof(*address_item->value));
address_item->value->ip_address = g_strdup(addr4);
address_item->value->ip_address_type = GUEST_IP_ADDRESS_TYPE_IPV4;
} else if (ifa->ifa_addr &&
ifa->ifa_addr->sa_family == AF_INET6) {
/* interface with IPv6 address */
- address_item = g_malloc0(sizeof(*address_item));
- address_item->value = g_malloc0(sizeof(*address_item->value));
p = &((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr;
if (!inet_ntop(AF_INET6, p, addr6, sizeof(addr6))) {
- snprintf(err_msg, sizeof(err_msg),
- "inet_ntop failed : %s", strerror(errno));
- error_set(errp, QERR_QGA_COMMAND_FAILED, err_msg);
+ error_setg_errno(errp, errno, "inet_ntop failed");
goto error;
}
+ address_item = g_malloc0(sizeof(*address_item));
+ address_item->value = g_malloc0(sizeof(*address_item->value));
address_item->value->ip_address = g_strdup(addr6);
address_item->value->ip_address_type = GUEST_IP_ADDRESS_TYPE_IPV6;
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)
return 0;
}
+#endif /* CONFIG_FSFREEZE */
+#if !defined(CONFIG_FSTRIM)
+void qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **err)
+{
+ error_set(err, QERR_UNSUPPORTED);
+}
#endif
/* register init/cleanup routines for stateful command groups */
projects / qemu.git / blobdiff