udf: convert udf_stamp_to_time and udf_time_to_stamp to use timestamps

* kernel_timestamp type was almost unused - only callers of udf_stamp_to_time
and udf_time_to_stamp used it, so let these functions handle endianness
internally and don't clutter code with conversions

* rename udf_stamp_to_time to udf_disk_stamp_to_time
  and udf_time_to_stamp to udf_time_to_disk_stamp

Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>

1 files changed, 12 insertions, 10 deletions

diff --git a/fs/udf/udftime.c b/fs/udf/udftime.c
index 12fae6cd444c..5f811655c9b5 100644
--- a/fs/udf/udftime.c
+++ b/fs/udf/udftime.c
@@ -85,14 +85,16 @@ extern struct timezone sys_tz;
 #define SECS_PER_HOUR   (60 * 60)
 #define SECS_PER_DAY    (SECS_PER_HOUR * 24)
 
-struct timespec *udf_stamp_to_time(struct timespec *dest, kernel_timestamp src)
+struct timespec *udf_disk_stamp_to_time(struct timespec *dest, timestamp src)
 {
         int yday;
-        uint8_t type = src.typeAndTimezone >> 12;
+        u16 typeAndTimezone = le16_to_cpu(src.typeAndTimezone);
+        u16 year = le16_to_cpu(src.year);
+        uint8_t type = typeAndTimezone >> 12;
         int16_t offset;
 
         if (type == 1) {
-                offset = src.typeAndTimezone << 4;
+                offset = typeAndTimezone << 4;
                 /* sign extent offset */
                 offset = (offset >> 4);
                 if (offset == -2047) /* unspecified offset */
@@ -100,21 +102,21 @@ struct timespec *udf_stamp_to_time(struct timespec *dest, kernel_timestamp src)
         } else
                 offset = 0;
 
-        if ((src.year < EPOCH_YEAR) ||
-            (src.year >= EPOCH_YEAR + MAX_YEAR_SECONDS)) {
+        if ((year < EPOCH_YEAR) ||
+            (year >= EPOCH_YEAR + MAX_YEAR_SECONDS)) {
                 return NULL;
         }
-        dest->tv_sec = year_seconds[src.year - EPOCH_YEAR];
+        dest->tv_sec = year_seconds[year - EPOCH_YEAR];
         dest->tv_sec -= offset * 60;
 
-        yday = ((__mon_yday[__isleap(src.year)][src.month - 1]) + src.day - 1);
+        yday = ((__mon_yday[__isleap(year)][src.month - 1]) + src.day - 1);
         dest->tv_sec += (((yday * 24) + src.hour) * 60 + src.minute) * 60 + src.second;
         dest->tv_nsec = 1000 * (src.centiseconds * 10000 +
                         src.hundredsOfMicroseconds * 100 + src.microseconds);
         return dest;
 }
 
-kernel_timestamp *udf_time_to_stamp(kernel_timestamp *dest, struct timespec ts)
+timestamp *udf_time_to_disk_stamp(timestamp *dest, struct timespec ts)
 {
         long int days, rem, y;
         const unsigned short int *ip;
@@ -125,7 +127,7 @@ kernel_timestamp *udf_time_to_stamp(kernel_timestamp *dest, struct timespec ts)
         if (!dest)
                 return NULL;
 
-        dest->typeAndTimezone = 0x1000 | (offset & 0x0FFF);
+        dest->typeAndTimezone = cpu_to_le16(0x1000 | (offset & 0x0FFF));
 
         ts.tv_sec += offset * 60;
         days = ts.tv_sec / SECS_PER_DAY;
@@ -148,7 +150,7 @@ kernel_timestamp *udf_time_to_stamp(kernel_timestamp *dest, struct timespec ts)
                          - LEAPS_THRU_END_OF(y - 1));
                 y = yg;
         }
-        dest->year = y;
+        dest->year = cpu_to_le16(y);
         ip = __mon_yday[__isleap(y)];
         for (y = 11; days < (long int)ip[y]; --y)
                 continue;