[RFC 14/32] ext4: convert to struct inode_time

Arnd Bergmann
2014-05-30T20:05:25Z

ext4fs uses unsigned 34-bit seconds for inode timestamps, which will work
for the next 500 years, but the VFS uses struct timespec for timestamps,
which is 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 ext4.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: Andreas Dilger <adilger.kernel@dilger.ca>
Cc: linux-ext4@vger.kernel.org
---
fs/ext4/ext4.h | 10 +++++-----
fs/ext4/extents.c | 2 +-
2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 92d9f1a..b60adc9 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -726,14 +726,14 @@ struct move_extent {
<= (EXT4_GOOD_OLD_INODE_SIZE + \
(einode)->i_extra_isize)) \

-static inline __le32 ext4_encode_extra_time(struct timespec *time)
+static inline __le32 ext4_encode_extra_time(struct inode_time *time)
{
return cpu_to_le32((sizeof(time->tv_sec) > 4 ?
(time->tv_sec >> 32) & EXT4_EPOCH_MASK : 0) |
((time->tv_nsec << EXT4_EPOCH_BITS) & EXT4_NSEC_MASK));
}

-static inline void ext4_decode_extra_time(struct timespec *time, __le32 extra)
+static inline void ext4_decode_extra_time(struct inode_time *time, __le32 extra)
{
if (sizeof(time->tv_sec) > 4)
time->tv_sec |= (__u64)(le32_to_cpu(extra) & EXT4_EPOCH_MASK)
@@ -879,9 +879,9 @@ struct ext4_inode_info {

/*
* File creation time. Its function is same as that of
- * struct timespec i_{a,c,m}time in the generic inode.
+ * struct inode_time i_{a,c,m}time in the generic inode.
*/
- struct timespec i_crtime;
+ struct inode_time i_crtime;

/* mballoc */
struct list_head i_prealloc_list;
@@ -1354,7 +1354,7 @@ static inline struct ext4_inode_info *EXT4_I(struct inode *inode)
return container_of(inode, struct ext4_inode_info, vfs_inode);
}

-static inline struct timespec ext4_current_time(struct inode *inode)
+static inline struct inode_time ext4_current_time(struct inode *inode)
{
return (inode->i_sb->s_time_gran < NSEC_PER_SEC) ?
current_fs_time(inode->i_sb) : CURRENT_TIME_SEC;
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index ee14768..ed11d79 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -4894,7 +4894,7 @@ long ext4_fallocate(struct file *file, int mode, loff_t offset, loff_t len)
int ret = 0;
int flags;
ext4_lblk_t lblk;
- struct timespec tv;
+ struct inode_time tv;
unsigned int blkbits = inode->i_blkbits;

/* Return error if mode is not supported */
--
1.8.3.2