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>

4 files changed, 41 insertions, 53 deletions

diff --git a/fs/udf/inode.c b/fs/udf/inode.c
index a7646e9bdbde..2362bf0c6900 100644
--- a/fs/udf/inode.c
+++ b/fs/udf/inode.c
@@ -1227,16 +1227,14 @@ static void udf_fill_inode(struct inode *inode, struct buffer_head *bh)
                 inode->i_blocks = le64_to_cpu(fe->logicalBlocksRecorded) <<
                         (inode->i_sb->s_blocksize_bits - 9);
 
-                if (!udf_stamp_to_time(&inode->i_atime,
-                                        lets_to_cpu(fe->accessTime)))
+                if (!udf_disk_stamp_to_time(&inode->i_atime, fe->accessTime))
                         inode->i_atime = sbi->s_record_time;
 
-                if (!udf_stamp_to_time(&inode->i_mtime,
-                                        lets_to_cpu(fe->modificationTime)))
+                if (!udf_disk_stamp_to_time(&inode->i_mtime,
+                                            fe->modificationTime))
                         inode->i_mtime = sbi->s_record_time;
 
-                if (!udf_stamp_to_time(&inode->i_ctime,
-                                        lets_to_cpu(fe->attrTime)))
+                if (!udf_disk_stamp_to_time(&inode->i_ctime, fe->attrTime))
                         inode->i_ctime = sbi->s_record_time;
 
                 iinfo->i_unique = le64_to_cpu(fe->uniqueID);
@@ -1247,20 +1245,17 @@ static void udf_fill_inode(struct inode *inode, struct buffer_head *bh)
                 inode->i_blocks = le64_to_cpu(efe->logicalBlocksRecorded) <<
                     (inode->i_sb->s_blocksize_bits - 9);
 
-                if (!udf_stamp_to_time(&inode->i_atime,
-                                        lets_to_cpu(efe->accessTime)))
+                if (!udf_disk_stamp_to_time(&inode->i_atime, efe->accessTime))
                         inode->i_atime = sbi->s_record_time;
 
-                if (!udf_stamp_to_time(&inode->i_mtime,
-                                        lets_to_cpu(efe->modificationTime)))
+                if (!udf_disk_stamp_to_time(&inode->i_mtime,
+                                            efe->modificationTime))
                         inode->i_mtime = sbi->s_record_time;
 
-                if (!udf_stamp_to_time(&iinfo->i_crtime,
-                                        lets_to_cpu(efe->createTime)))
+                if (!udf_disk_stamp_to_time(&iinfo->i_crtime, efe->createTime))
                         iinfo->i_crtime = sbi->s_record_time;
 
-                if (!udf_stamp_to_time(&inode->i_ctime,
-                                        lets_to_cpu(efe->attrTime)))
+                if (!udf_disk_stamp_to_time(&inode->i_ctime, efe->attrTime))
                         inode->i_ctime = sbi->s_record_time;
 
                 iinfo->i_unique = le64_to_cpu(efe->uniqueID);
@@ -1382,7 +1377,6 @@ static int udf_update_inode(struct inode *inode, int do_sync)
         uint32_t udfperms;
         uint16_t icbflags;
         uint16_t crclen;
-        kernel_timestamp cpu_time;
         int err = 0;
         struct udf_sb_info *sbi = UDF_SB(inode->i_sb);
         unsigned char blocksize_bits = inode->i_sb->s_blocksize_bits;
@@ -1485,12 +1479,9 @@ static int udf_update_inode(struct inode *inode, int do_sync)
                         (inode->i_blocks + (1 << (blocksize_bits - 9)) - 1) >>
                         (blocksize_bits - 9));
 
-                if (udf_time_to_stamp(&cpu_time, inode->i_atime))
-                        fe->accessTime = cpu_to_lets(cpu_time);
-                if (udf_time_to_stamp(&cpu_time, inode->i_mtime))
-                        fe->modificationTime = cpu_to_lets(cpu_time);
-                if (udf_time_to_stamp(&cpu_time, inode->i_ctime))
-                        fe->attrTime = cpu_to_lets(cpu_time);
+                udf_time_to_disk_stamp(&fe->accessTime, inode->i_atime);
+                udf_time_to_disk_stamp(&fe->modificationTime, inode->i_mtime);
+                udf_time_to_disk_stamp(&fe->attrTime, inode->i_ctime);
                 memset(&(fe->impIdent), 0, sizeof(regid));
                 strcpy(fe->impIdent.ident, UDF_ID_DEVELOPER);
                 fe->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
@@ -1525,14 +1516,10 @@ static int udf_update_inode(struct inode *inode, int do_sync)
                      iinfo->i_crtime.tv_nsec > inode->i_ctime.tv_nsec))
                         iinfo->i_crtime = inode->i_ctime;
 
-                if (udf_time_to_stamp(&cpu_time, inode->i_atime))
-                        efe->accessTime = cpu_to_lets(cpu_time);
-                if (udf_time_to_stamp(&cpu_time, inode->i_mtime))
-                        efe->modificationTime = cpu_to_lets(cpu_time);
-                if (udf_time_to_stamp(&cpu_time, iinfo->i_crtime))
-                        efe->createTime = cpu_to_lets(cpu_time);
-                if (udf_time_to_stamp(&cpu_time, inode->i_ctime))
-                        efe->attrTime = cpu_to_lets(cpu_time);
+                udf_time_to_disk_stamp(&efe->accessTime, inode->i_atime);
+                udf_time_to_disk_stamp(&efe->modificationTime, inode->i_mtime);
+                udf_time_to_disk_stamp(&efe->createTime, iinfo->i_crtime);
+                udf_time_to_disk_stamp(&efe->attrTime, inode->i_ctime);
 
                 memset(&(efe->impIdent), 0, sizeof(regid));
                 strcpy(efe->impIdent.ident, UDF_ID_DEVELOPER);
diff --git a/fs/udf/super.c b/fs/udf/super.c
index f4cdd530c65f..4d2ecee1970b 100644
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -943,8 +943,8 @@ static void udf_load_pvoldesc(struct super_block *sb, struct buffer_head *bh)
 
         pvoldesc = (struct primaryVolDesc *)bh->b_data;
 
-        if (udf_stamp_to_time(&UDF_SB(sb)->s_record_time,
-                              lets_to_cpu(pvoldesc->recordingDateAndTime))) {
+        if (udf_disk_stamp_to_time(&UDF_SB(sb)->s_record_time,
+                              pvoldesc->recordingDateAndTime)) {
                 kernel_timestamp ts;
                 ts = lets_to_cpu(pvoldesc->recordingDateAndTime);
                 udf_debug("recording time %04u/%02u/%02u"
@@ -1589,7 +1589,6 @@ static void udf_open_lvid(struct super_block *sb)
         struct udf_sb_info *sbi = UDF_SB(sb);
         struct buffer_head *bh = sbi->s_lvid_bh;
         if (bh) {
-                kernel_timestamp cpu_time;
                 struct logicalVolIntegrityDesc *lvid =
                                 (struct logicalVolIntegrityDesc *)bh->b_data;
                 struct logicalVolIntegrityDescImpUse *lvidiu =
@@ -1597,8 +1596,8 @@ static void udf_open_lvid(struct super_block *sb)
 
                 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
                 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
-                if (udf_time_to_stamp(&cpu_time, CURRENT_TIME))
-                        lvid->recordingDateAndTime = cpu_to_lets(cpu_time);
+                udf_time_to_disk_stamp(&lvid->recordingDateAndTime,
+                                        CURRENT_TIME);
                 lvid->integrityType = LVID_INTEGRITY_TYPE_OPEN;
 
                 lvid->descTag.descCRC = cpu_to_le16(
@@ -1613,7 +1612,6 @@ static void udf_open_lvid(struct super_block *sb)
 
 static void udf_close_lvid(struct super_block *sb)
 {
-        kernel_timestamp cpu_time;
         struct udf_sb_info *sbi = UDF_SB(sb);
         struct buffer_head *bh = sbi->s_lvid_bh;
         struct logicalVolIntegrityDesc *lvid;
@@ -1628,8 +1626,8 @@ static void udf_close_lvid(struct super_block *sb)
                                                         udf_sb_lvidiu(sbi);
                 lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
                 lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
-                if (udf_time_to_stamp(&cpu_time, CURRENT_TIME))
-                        lvid->recordingDateAndTime = cpu_to_lets(cpu_time);
+                udf_time_to_disk_stamp(&lvid->recordingDateAndTime,
+                                        CURRENT_TIME);
                 if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev))
                         lvidiu->maxUDFWriteRev =
                                         cpu_to_le16(UDF_MAX_WRITE_VERSION);
@@ -1801,12 +1799,12 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent)
         }
 
         if (!silent) {
-                kernel_timestamp ts;
-                udf_time_to_stamp(&ts, sbi->s_record_time);
+                timestamp ts;
+                udf_time_to_disk_stamp(&ts, sbi->s_record_time);
                 udf_info("UDF: Mounting volume '%s', "
                          "timestamp %04u/%02u/%02u %02u:%02u (%x)\n",
-                         sbi->s_volume_ident, ts.year, ts.month, ts.day,
-                         ts.hour, ts.minute, ts.typeAndTimezone);
+                         sbi->s_volume_ident, le16_to_cpu(ts.year), ts.month, ts.day,
+                         ts.hour, ts.minute, le16_to_cpu(ts.typeAndTimezone));
         }
         if (!(sb->s_flags & MS_RDONLY))
                 udf_open_lvid(sb);
diff --git a/fs/udf/udfdecl.h b/fs/udf/udfdecl.h
index b277524fe608..2cb2f5de4245 100644
--- a/fs/udf/udfdecl.h
+++ b/fs/udf/udfdecl.h
@@ -222,7 +222,8 @@ extern short_ad *udf_get_fileshortad(uint8_t *, int, uint32_t *, int);
 extern uint16_t udf_crc(const uint8_t *, uint32_t, uint16_t);
 
 /* udftime.c */
-extern struct timespec *udf_stamp_to_time(struct timespec *dest, kernel_timestamp src);
-extern kernel_timestamp *udf_time_to_stamp(kernel_timestamp *dest, struct timespec src);
+extern struct timespec *udf_disk_stamp_to_time(struct timespec *dest,
+                                                timestamp src);
+extern timestamp *udf_time_to_disk_stamp(timestamp *dest, struct timespec src);
 
 #endif                          /* __UDF_DECL_H */
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;