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| author | Theodore Ts'o <tytso@mit.edu> | 2019-08-12 13:44:49 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2019-08-12 13:44:49 -0400 |
| commit | cd2d99229dc96219547e6349841e1aad851c6acc (patch) | |
| tree | b6bf93e9c34772d32b2677e5a6267e328c82f8ff | |
| parent | bb5835edcdf8bf78bbe51cff13e332c439bc0567 (diff) | |
| download | linux-cd2d99229dc96219547e6349841e1aad851c6acc.tar.bz2 | |
ext4: drop legacy pre-1970 encoding workaround
Originally, support for expanded timestamps had a bug in that pre-1970
times were erroneously encoded as being in the the 24th century. This
was fixed in commit a4dad1ae24f8 ("ext4: Fix handling of extended
tv_sec") which landed in 4.4. Starting with 4.4, pre-1970 timestamps
were correctly encoded, but for backwards compatibility those
incorrectly encoded timestamps were mapped back to the pre-1970 dates.
Given that backwards compatibility workaround has been around for 4
years, and given that running e2fsck from e2fsprogs 1.43.2 and later
will offer to fix these timestamps (which has been released for 3
years), it's past time to drop the legacy workaround from the kernel.
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
| -rw-r--r-- | fs/ext4/ext4.h | 15 |
1 files changed, 1 insertions, 14 deletions
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index e2d8ad27f4d1..17cc2dc13174 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -828,21 +828,8 @@ static inline __le32 ext4_encode_extra_time(struct timespec64 *time) static inline void ext4_decode_extra_time(struct timespec64 *time, __le32 extra) { - if (unlikely(extra & cpu_to_le32(EXT4_EPOCH_MASK))) { - -#if 1 - /* Handle legacy encoding of pre-1970 dates with epoch - * bits 1,1. (This backwards compatibility may be removed - * at the discretion of the ext4 developers.) - */ - u64 extra_bits = le32_to_cpu(extra) & EXT4_EPOCH_MASK; - if (extra_bits == 3 && ((time->tv_sec) & 0x80000000) != 0) - extra_bits = 0; - time->tv_sec += extra_bits << 32; -#else + if (unlikely(extra & cpu_to_le32(EXT4_EPOCH_MASK))) time->tv_sec += (u64)(le32_to_cpu(extra) & EXT4_EPOCH_MASK) << 32; -#endif - } time->tv_nsec = (le32_to_cpu(extra) & EXT4_NSEC_MASK) >> EXT4_EPOCH_BITS; } |