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| author | Theodore Ts'o <tytso@mit.edu> | 2009-09-30 07:13:55 +0200 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2009-09-30 07:13:55 +0200 |
| commit | c1fccc0696bcaff6008c11865091f5ec4b0937ab (patch) | |
| tree | 0e8269e07d40278c136b7f93aba7ab118f75f532 /fs | |
| parent | ext4: Add a stub for mpage_da_data in the trace header (diff) | |
| download | linux-c1fccc0696bcaff6008c11865091f5ec4b0937ab.tar.xz linux-c1fccc0696bcaff6008c11865091f5ec4b0937ab.zip | |
ext4: Fix time encoding with extra epoch bits
"Looking at ext4.h, I think the setting of extra time fields forgets to
mask the epoch bits so the epoch part overwrites nsec part. The second
change is only for coherency (2 -> EXT4_EPOCH_BITS)."
Thanks to Damien Guibouret for pointing out this problem.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/ext4/ext4.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index c508cf7be75c..984ca0cb38c3 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -525,8 +525,8 @@ struct move_extent { static inline __le32 ext4_encode_extra_time(struct timespec *time) { return cpu_to_le32((sizeof(time->tv_sec) > 4 ? - time->tv_sec >> 32 : 0) | - ((time->tv_nsec << 2) & EXT4_NSEC_MASK)); + (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) @@ -534,7 +534,7 @@ static inline void ext4_decode_extra_time(struct timespec *time, __le32 extra) if (sizeof(time->tv_sec) > 4) time->tv_sec |= (__u64)(le32_to_cpu(extra) & EXT4_EPOCH_MASK) << 32; - time->tv_nsec = (le32_to_cpu(extra) & EXT4_NSEC_MASK) >> 2; + time->tv_nsec = (le32_to_cpu(extra) & EXT4_NSEC_MASK) >> EXT4_EPOCH_BITS; } #define EXT4_INODE_SET_XTIME(xtime, inode, raw_inode) \ |