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xfs: redefine xfs_timestamp_t

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Redefine xfs_timestamp_t as a __be64 typedef in preparation for the
bigtime functionality.  Preserve the legacy structure format so that we
can let the compiler take care of masking and shifting.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Gao Xiang <hsiangkao@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
This commit is contained in:
Darrick J. Wong
2020-08-24 15:15:46 -07:00
parent 88947ea0ba
commit 5a0bb066f6
6 changed files with 85 additions and 36 deletions
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10
fs/xfs/libxfs/xfs_format.h
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@@ -856,12 +856,16 @@ struct xfs_agfl {
* 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.
* constrain the incore timestamps on a Unix system. Note that we actually
* encode a __be64 value on disk.
*/
typedef struct xfs_timestamp {
typedef __be64 xfs_timestamp_t;
/* Legacy timestamp encoding format. */
struct xfs_legacy_timestamp {
__be32 t_sec; /* timestamp seconds */
__be32 t_nsec; /* timestamp nanoseconds */
} xfs_timestamp_t;
};
/*
* Smallest possible ondisk seconds value with traditional timestamps. This