[RFC 21/32] udf: convert to struct inode_time

Arnd Bergmann
2014-05-30T20:05:33Z

udf uses 16-bit year numbers for inode timestamps, which will work
for the 15000 years, but the VFS uses struct timespec for timestamps,
and the Linux udf implementation internally uses a time_t, both of
which are only good until 2038 on 32-bit CPUs.

This gets us one small step closer to lifting the VFS limit by using
struct inode_time in udf, but the implementation still depends on
the 'year_seconds' array that needs to be extended or replaced by
an algorithm that calculates the correct time for every year.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Jan Kara <jack@suse.cz>
---
fs/udf/udf_i.h | 2 +-
fs/udf/udf_sb.h | 2 +-
fs/udf/udfdecl.h | 7 ++++---
fs/udf/udftime.c | 7 ++++---
4 files changed, 10 insertions(+), 8 deletions(-)

diff --git a/fs/udf/udf_i.h b/fs/udf/udf_i.h
index b5cd8ed..ba12313 100644
--- a/fs/udf/udf_i.h
+++ b/fs/udf/udf_i.h
@@ -27,7 +27,7 @@ struct udf_ext_cache {
*/

struct udf_inode_info {
- struct timespec i_crtime;
+ struct inode_time i_crtime;
/* Physical address of inode */
struct kernel_lb_addr i_location;
__u64 i_unique;
diff --git a/fs/udf/udf_sb.h b/fs/udf/udf_sb.h
index 1f32c7b..20ab0ca 100644
--- a/fs/udf/udf_sb.h
+++ b/fs/udf/udf_sb.h
@@ -135,7 +135,7 @@ struct udf_sb_info {
rwlock_t s_cred_lock;

/* Root Info */
- struct timespec s_record_time;
+ struct inode_time s_record_time;

/* Fileset Info */
__u16 s_serial_number;
diff --git a/fs/udf/udfdecl.h b/fs/udf/udfdecl.h
index be7dabb..88320da 100644
--- a/fs/udf/udfdecl.h
+++ b/fs/udf/udfdecl.h
@@ -237,8 +237,9 @@ extern struct long_ad *udf_get_filelongad(uint8_t *, int, uint32_t *, int);
extern struct short_ad *udf_get_fileshortad(uint8_t *, int, uint32_t *, int);

/* udftime.c */
-extern struct timespec *udf_disk_stamp_to_time(struct timespec *dest,
- struct timestamp src);
-extern struct timestamp *udf_time_to_disk_stamp(struct timestamp *dest, struct timespec src);
+extern struct inode_time *udf_disk_stamp_to_time(struct inode_time *dest,
+ struct timestamp src);
+extern struct timestamp *udf_time_to_disk_stamp(struct timestamp *dest,
+ struct inode_time src);

#endif /* __UDF_DECL_H */
diff --git a/fs/udf/udftime.c b/fs/udf/udftime.c
index 1f11483..1ab6fe7 100644
--- a/fs/udf/udftime.c
+++ b/fs/udf/udftime.c
@@ -60,6 +60,7 @@ static const unsigned short int __mon_yday[2][13] = {
#define SPD 0x15180 /*3600*24 */
#define SPY(y, l, s) (SPD * (365 * y + l) + s)

+/* FIXME: convert this to a 64-bit type */
static time_t year_seconds[MAX_YEAR_SECONDS] = {
/*1970*/ SPY(0, 0, 0), SPY(1, 0, 0), SPY(2, 0, 0), SPY(3, 1, 0),
/*1974*/ SPY(4, 1, 0), SPY(5, 1, 0), SPY(6, 1, 0), SPY(7, 2, 0),
@@ -86,8 +87,8 @@ extern struct timezone sys_tz;
#define SECS_PER_HOUR (60 * 60)
#define SECS_PER_DAY (SECS_PER_HOUR * 24)

-struct timespec *
-udf_disk_stamp_to_time(struct timespec *dest, struct timestamp src)
+struct inode_time *
+udf_disk_stamp_to_time(struct inode_time *dest, struct timestamp src)
{
int yday;
u16 typeAndTimezone = le16_to_cpu(src.typeAndTimezone);
@@ -119,7 +120,7 @@ udf_disk_stamp_to_time(struct timespec *dest, struct timestamp src)
}

struct timestamp *
-udf_time_to_disk_stamp(struct timestamp *dest, struct timespec ts)
+udf_time_to_disk_stamp(struct timestamp *dest, struct inode_time ts)
{
long int days, rem, y;
const unsigned short int *ip;
--
1.8.3.2