---
cutils.c | 43 +++++++++++++++++++++++++++++++++++++++++++
hw/virtio-9p-local.c | 4 ++--
qemu-common.h | 10 ++++++++++
3 files changed, 55 insertions(+), 2 deletions(-)
diff --git a/cutils.c b/cutils.c
index 536ee93..3c18941 100644
--- a/cutils.c
+++ b/cutils.c
@@ -288,3 +288,46 @@ int fcntl_setfl(int fd, int flag)
}
#endif
+int qemu_utimensat(int dirfd, const char *path, const struct timespec *times,
+ int flags)
+{
+#ifdef CONFIG_UTIMENSAT
+ return utimensat(dirfd, path, times, flags);
+#else
+ /* Fallback: use utimes() instead of utimensat() */
+ struct timeval tv[2], tv_now;
+ struct stat st;
+ int i;
+
+ /* happy if special cases */
+ if (times[0].tv_nsec == UTIME_OMIT&& times[1].tv_nsec == UTIME_OMIT) {
+ return 0;
+ }
+ if (times[0].tv_nsec == UTIME_NOW&& times[1].tv_nsec == UTIME_NOW) {
+ return utimes(path, NULL);
+ }
+
+ /* prepare for hard cases */
+ if (times[0].tv_nsec == UTIME_NOW || times[1].tv_nsec == UTIME_NOW) {
+ gettimeofday(&tv_now, NULL);
+ }
+ if (times[0].tv_nsec == UTIME_OMIT || times[1].tv_nsec == UTIME_OMIT) {
+ stat(path,&st);
+ }
+
+ for (i = 0; i< 2; i++) {
+ if (times[i].tv_nsec == UTIME_NOW) {
+ tv[i].tv_sec = tv_now.tv_sec;
+ tv[i].tv_usec = 0;
+ } else if (times[i].tv_nsec == UTIME_OMIT) {
+ tv[i].tv_sec = (i == 0) ? st.st_atime : st.st_mtime;
+ tv[i].tv_usec = 0;
+ } else {
+ tv[i].tv_sec = times[i].tv_sec;
+ tv[i].tv_usec = times[i].tv_nsec / 1000;
+ }
+ }
+
+ return utimes(path,&tv[0]);
+#endif
+}
diff --git a/hw/virtio-9p-local.c b/hw/virtio-9p-local.c
index 0d52020..41603ea 100644
--- a/hw/virtio-9p-local.c
+++ b/hw/virtio-9p-local.c
@@ -480,9 +480,9 @@ static int local_chown(FsContext *fs_ctx, const char *path,
FsCred *credp)
}
static int local_utimensat(FsContext *s, const char *path,
- const struct timespec *buf)
+ const struct timespec *buf)
{
- return utimensat(AT_FDCWD, rpath(s, path), buf, AT_SYMLINK_NOFOLLOW);
+ return qemu_utimensat(AT_FDCWD, rpath(s, path), buf, AT_SYMLINK_NOFOLLOW);
}
static int local_remove(FsContext *ctx, const char *path)
diff --git a/qemu-common.h b/qemu-common.h
index 2fbc27f..7fe4c16 100644
--- a/qemu-common.h
+++ b/qemu-common.h
@@ -146,6 +146,16 @@ time_t mktimegm(struct tm *tm);
int qemu_fls(int i);
int qemu_fdatasync(int fd);
int fcntl_setfl(int fd, int flag);
+#ifndef CONFIG_UTIMENSAT
+#ifndef UTIME_NOW
+# define UTIME_NOW ((1l<< 30) - 1l)
+#endif
+#ifndef UTIME_OMIT
+# define UTIME_OMIT ((1l<< 30) - 2l)
+#endif
+#endif
+int qemu_utimensat(int dirfd, const char *path, const struct timespec *times,
+ int flags);
/* path.c */
void init_paths(const char *prefix);