linux-master/fs/utimes.c

20 int vfs_utimes(const struct path *path, struct timespec64 *times)
27 	if (times) {
28 		if (!nsec_valid(times[0].tv_nsec) ||
29 		    !nsec_valid(times[1].tv_nsec))
31 		if (times[0].tv_nsec == UTIME_NOW &&
32 		    times[1].tv_nsec == UTIME_NOW)
33 			times = NULL;
41 	if (times) {
42 		if (times[0].tv_nsec == UTIME_OMIT)
44 		else if (times[0].tv_nsec != UTIME_NOW) {
45 			newattrs.ia_atime = times[0];
49 		if (times[1].tv_nsec == UTIME_OMIT)
51 		else if (times[1].tv_nsec != UTIME_NOW) {
52 			newattrs.ia_mtime = times[1];
81 		struct timespec64 *times, int flags)
99 	error = vfs_utimes(&path, times);
109 static int do_utimes_fd(int fd, struct timespec64 *times, int flags)
120 	error = vfs_utimes(&f.file->f_path, times);
126  * do_utimes - change times on filename or file descriptor
129  * @times: new times or NULL
136  * If times==NULL, set access and modification to current time,
138  * Else, update from *times, must be owner or super user.
140 long do_utimes(int dfd, const char __user *filename, struct timespec64 *times,
144 		return do_utimes_fd(dfd, times, flags);
145 	return do_utimes_path(dfd, filename, times, flags);
177 	struct __kernel_old_timeval times[2];
181 		if (copy_from_user(&times, utimes, sizeof(times)))
189 		if (times[0].tv_usec >= 1000000 || times[0].tv_usec < 0 ||
190 		    times[1].tv_usec >= 1000000 || times[1].tv_usec < 0)
193 		tstimes[0].tv_sec = times[0].tv_sec;
194 		tstimes[0].tv_nsec = 1000 * times[0].tv_usec;
195 		tstimes[1].tv_sec = times[1].tv_sec;
196 		tstimes[1].tv_nsec = 1000 * times[1].tv_usec;
215 SYSCALL_DEFINE2(utime, char __user *, filename, struct utimbuf __user *, times)
219 	if (times) {
220 		if (get_user(tv[0].tv_sec, &times->actime) ||
221 		    get_user(tv[1].tv_sec, &times->modtime))
226 	return do_utimes(AT_FDCWD, filename, times ? tv : NULL, 0);