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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
Download patch file Download diff file Expand all files Collapse all files

72
fs/xfs/xfs_trans.c
View file

@ -548,7 +548,7 @@ STATIC void
xfs_trans_apply_sb_deltas(
xfs_trans_t *tp)
{
xfs_sb_t *sbp;
xfs_dsb_t *sbp;
xfs_buf_t *bp;
int whole = 0;
@ -566,57 +566,51 @@ xfs_trans_apply_sb_deltas(
* Only update the superblock counters if we are logging them
*/
if (!xfs_sb_version_haslazysbcount(&(tp->t_mountp->m_sb))) {
if (tp->t_icount_delta != 0) {
INT_MOD(sbp->sb_icount, ARCH_CONVERT, tp->t_icount_delta);
}
if (tp->t_ifree_delta != 0) {
INT_MOD(sbp->sb_ifree, ARCH_CONVERT, tp->t_ifree_delta);
}
if (tp->t_fdblocks_delta != 0) {
INT_MOD(sbp->sb_fdblocks, ARCH_CONVERT, tp->t_fdblocks_delta);
}
if (tp->t_res_fdblocks_delta != 0) {
INT_MOD(sbp->sb_fdblocks, ARCH_CONVERT, tp->t_res_fdblocks_delta);
}
if (tp->t_icount_delta)
be64_add(&sbp->sb_icount, tp->t_icount_delta);
if (tp->t_ifree_delta)
be64_add(&sbp->sb_ifree, tp->t_ifree_delta);
if (tp->t_fdblocks_delta)
be64_add(&sbp->sb_fdblocks, tp->t_fdblocks_delta);
if (tp->t_res_fdblocks_delta)
be64_add(&sbp->sb_fdblocks, tp->t_res_fdblocks_delta);
}
if (tp->t_frextents_delta != 0) {
INT_MOD(sbp->sb_frextents, ARCH_CONVERT, tp->t_frextents_delta);
}
if (tp->t_res_frextents_delta != 0) {
INT_MOD(sbp->sb_frextents, ARCH_CONVERT, tp->t_res_frextents_delta);
}
if (tp->t_dblocks_delta != 0) {
INT_MOD(sbp->sb_dblocks, ARCH_CONVERT, tp->t_dblocks_delta);
if (tp->t_frextents_delta)
be64_add(&sbp->sb_frextents, tp->t_frextents_delta);
if (tp->t_res_frextents_delta)
be64_add(&sbp->sb_frextents, tp->t_res_frextents_delta);
if (tp->t_dblocks_delta) {
be64_add(&sbp->sb_dblocks, tp->t_dblocks_delta);
whole = 1;
}
if (tp->t_agcount_delta != 0) {
INT_MOD(sbp->sb_agcount, ARCH_CONVERT, tp->t_agcount_delta);
if (tp->t_agcount_delta) {
be32_add(&sbp->sb_agcount, tp->t_agcount_delta);
whole = 1;
}
if (tp->t_imaxpct_delta != 0) {
INT_MOD(sbp->sb_imax_pct, ARCH_CONVERT, tp->t_imaxpct_delta);
if (tp->t_imaxpct_delta) {
sbp->sb_imax_pct += tp->t_imaxpct_delta;
whole = 1;
}
if (tp->t_rextsize_delta != 0) {
INT_MOD(sbp->sb_rextsize, ARCH_CONVERT, tp->t_rextsize_delta);
if (tp->t_rextsize_delta) {
be32_add(&sbp->sb_rextsize, tp->t_rextsize_delta);
whole = 1;
}
if (tp->t_rbmblocks_delta != 0) {
INT_MOD(sbp->sb_rbmblocks, ARCH_CONVERT, tp->t_rbmblocks_delta);
if (tp->t_rbmblocks_delta) {
be32_add(&sbp->sb_rbmblocks, tp->t_rbmblocks_delta);
whole = 1;
}
if (tp->t_rblocks_delta != 0) {
INT_MOD(sbp->sb_rblocks, ARCH_CONVERT, tp->t_rblocks_delta);
if (tp->t_rblocks_delta) {
be64_add(&sbp->sb_rblocks, tp->t_rblocks_delta);
whole = 1;
}
if (tp->t_rextents_delta != 0) {
INT_MOD(sbp->sb_rextents, ARCH_CONVERT, tp->t_rextents_delta);
if (tp->t_rextents_delta) {
be64_add(&sbp->sb_rextents, tp->t_rextents_delta);
whole = 1;
}
if (tp->t_rextslog_delta != 0) {
INT_MOD(sbp->sb_rextslog, ARCH_CONVERT, tp->t_rextslog_delta);
if (tp->t_rextslog_delta) {
sbp->sb_rextslog += tp->t_rextslog_delta;
whole = 1;
}
@ -624,14 +618,14 @@ xfs_trans_apply_sb_deltas(
/*
* Log the whole thing, the fields are noncontiguous.
*/
xfs_trans_log_buf(tp, bp, 0, sizeof(xfs_sb_t) - 1);
xfs_trans_log_buf(tp, bp, 0, sizeof(xfs_dsb_t) - 1);
else
/*
* Since all the modifiable fields are contiguous, we
* can get away with this.
*/
xfs_trans_log_buf(tp, bp, offsetof(xfs_sb_t, sb_icount),
offsetof(xfs_sb_t, sb_frextents) +
xfs_trans_log_buf(tp, bp, offsetof(xfs_dsb_t, sb_icount),
offsetof(xfs_dsb_t, sb_frextents) +
sizeof(sbp->sb_frextents) - 1);
XFS_MTOVFS(tp->t_mountp)->vfs_super->s_dirt = 1;