diff options
| author | Darrick J. Wong | 2020-08-17 09:58:02 -0700 |
|---|---|---|
| committer | Darrick J. Wong | 2020-09-15 20:52:40 -0700 |
| commit | 876fdc7c4f366a709ac272ef3336ae7dce58f2af (patch) | |
| tree | f578d9eaefec7ce8e3a519954929a653da197b27 /fs/xfs | |
| parent | b896a39faa5a2f97dadfb347928466afb12cc63a (diff) | |
xfs: explicitly define inode timestamp range
Formally define the inode timestamp ranges that existing filesystems
support, and switch the vfs timetamp ranges to use it.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Allison Collins <allison.henderson@oracle.com>
Reviewed-by: Gao Xiang <hsiangkao@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Diffstat (limited to 'fs/xfs')
| -rw-r--r-- | fs/xfs/libxfs/xfs_format.h | 22 | ||||
| -rw-r--r-- | fs/xfs/xfs_super.c | 4 |
2 files changed, 24 insertions, 2 deletions
diff --git a/fs/xfs/libxfs/xfs_format.h b/fs/xfs/libxfs/xfs_format.h index fe129fe16d5f..e57360a8fd16 100644 --- a/fs/xfs/libxfs/xfs_format.h +++ b/fs/xfs/libxfs/xfs_format.h @@ -848,12 +848,34 @@ struct xfs_agfl { ASSERT(xfs_daddr_to_agno(mp, d) == \ xfs_daddr_to_agno(mp, (d) + (len) - 1))) +/* + * XFS Timestamps + * ============== + * + * Traditional ondisk inode timestamps consist of signed 32-bit counters for + * seconds and nanoseconds; time zero is the Unix epoch, Jan 1 00:00:00 UTC + * 1970, which means that the timestamp epoch is the same as the Unix epoch. + * Therefore, the ondisk min and max defined here can be used directly to + * constrain the incore timestamps on a Unix system. + */ typedef struct xfs_timestamp { __be32 t_sec; /* timestamp seconds */ __be32 t_nsec; /* timestamp nanoseconds */ } xfs_timestamp_t; /* + * Smallest possible ondisk seconds value with traditional timestamps. This + * corresponds exactly with the incore timestamp Dec 13 20:45:52 UTC 1901. + */ +#define XFS_LEGACY_TIME_MIN ((int64_t)S32_MIN) + +/* + * Largest possible ondisk seconds value with traditional timestamps. This + * corresponds exactly with the incore timestamp Jan 19 03:14:07 UTC 2038. + */ +#define XFS_LEGACY_TIME_MAX ((int64_t)S32_MAX) + +/* * On-disk inode structure. * * This is just the header or "dinode core", the inode is expanded to fill a diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c index e61199a4691c..2981743def87 100644 --- a/fs/xfs/xfs_super.c +++ b/fs/xfs/xfs_super.c @@ -1484,8 +1484,8 @@ xfs_fc_fill_super( sb->s_maxbytes = MAX_LFS_FILESIZE; sb->s_max_links = XFS_MAXLINK; sb->s_time_gran = 1; - sb->s_time_min = S32_MIN; - sb->s_time_max = S32_MAX; + sb->s_time_min = XFS_LEGACY_TIME_MIN; + sb->s_time_max = XFS_LEGACY_TIME_MAX; sb->s_iflags |= SB_I_CGROUPWB; set_posix_acl_flag(sb); |