xfs: explicitly define inode timestamp range

	    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.

 *

	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);