[CIFS] Legacy time handling for Win9x and OS/2 part 1
Signed-off-by: Steve French <sfrench@us.ibm.com>
diff --git a/fs/cifs/netmisc.c b/fs/cifs/netmisc.c
index ce87550..fa5124d 100644
--- a/fs/cifs/netmisc.c
+++ b/fs/cifs/netmisc.c
@@ -909,3 +909,54 @@
/* Convert to 100ns intervals and then add the NTFS time offset. */
return (u64) t.tv_sec * 10000000 + t.tv_nsec/100 + NTFS_TIME_OFFSET;
}
+
+static int total_days_of_prev_months[] =
+{0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334};
+
+
+__le64 cnvrtDosCifsTm(__u16 date, __u16 time)
+{
+ return cpu_to_le64(cifs_UnixTimeToNT(cnvrtDosUnixTm(date, time)));
+}
+struct timespec cnvrtDosUnixTm(__u16 date, __u16 time)
+{
+ __u8 dt[2];
+ __u8 tm[2];
+ struct timespec ts;
+ int sec,min, days, month, year;
+ struct timespec removeme; /* BB removeme BB */
+/* SMB_TIME * st = (SMB_TIME *)&time;*/
+
+ cFYI(1,("date %d time %d",date, time));
+
+ dt[0] = date & 0xFF;
+ dt[1] = (date & 0xFF00) >> 8;
+ tm[0] = time & 0xFF;
+ tm[1] = (time & 0xFF00) >> 8;
+
+ sec = tm[0] & 0x1F;
+ sec = 2 * sec;
+ min = ((tm[0] >>5)&0xFF) + ((tm[1] & 0x7)<<3);
+
+ sec += (min * 60);
+ sec += 60 * 60 * ((tm[1] >> 3) &0xFF) /* hours */;
+ days = (dt[0] & 0x1F) - 1;
+ month = ((dt[0] >> 5) & 0xFF) + ((dt[1] & 0x1) <<3);
+ if(month > 12)
+ cERROR(1,("illegal month %d in date", month));
+ month -= 1;
+ days += total_days_of_prev_months[month];
+ days += 3653; /* account for difference in days between 1980 and 1970 */
+ year = (dt[1]>>1) & 0xFF;
+ days += year * 365;
+ days += (year/4); /* leap year */
+ /* adjust for leap year where we are still before leap day */
+ days -= ((year & 0x03) == 0) && (month < 2 ? 1 : 0);
+ sec += 24 * 60 * 60 * days;
+
+ removeme = CURRENT_TIME; /* BB removeme BB */
+ ts.tv_sec = sec;
+
+ ts.tv_nsec = 0;
+ return ts;
+}