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[XFS] superblock endianess annotations

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Creates a new xfs_dsb_t that is __be annotated and keeps xfs_sb_t for the
incore one. xfs_xlatesb is renamed to xfs_sb_to_disk and only handles the
incore -> disk conversion. A new helper xfs_sb_from_disk handles the other
direction and doesn't need the slightly hacky table-driven approach
because we only ever read the full sb from disk.

The handling of shared r/o filesystems has been buggy on little endian
system and fixing this required shuffling around of some code in that
area.

SGI-PV: 968563
SGI-Modid: xfs-linux-melb:xfs-kern:29477a

Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>
This commit is contained in:
Christoph Hellwig 2007-08-28 13:58:06 +10:00 • committed by Tim Shimmin
parent 347d1c0195
commit 2bdf7cd0ba
6 changed files with 191 additions and 94 deletions
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4
fs/xfs/xfs_log_recover.c
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@ -3846,7 +3846,7 @@ xlog_do_recover(
/* Convert superblock from on-disk format */
sbp = &log->l_mp->m_sb;
xfs_xlatesb(XFS_BUF_TO_SBP(bp), sbp, 1, XFS_SB_ALL_BITS);
xfs_sb_from_disk(sbp, XFS_BUF_TO_SBP(bp));
ASSERT(sbp->sb_magicnum == XFS_SB_MAGIC);
ASSERT(XFS_SB_GOOD_VERSION(sbp));
xfs_buf_relse(bp);
@ -4024,7 +4024,7 @@ xlog_recover_check_summary(
sbbp = xfs_getsb(mp, 0);
#ifdef XFS_LOUD_RECOVERY
sbp = &mp->m_sb;
xfs_xlatesb(XFS_BUF_TO_SBP(sbbp), sbp, 1, XFS_SB_ALL_BITS);
xfs_sb_from_disk(sbp, XFS_BUF_TO_SBP(sbbp));
cmn_err(CE_NOTE,
"xlog_recover_check_summary: sb_icount %Lu itotal %Lu",
sbp->sb_icount, itotal);