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xfs: turn ag header initialisation into a table driven operation 

There's still more cookie cutter code in setting up each AG header.
Separate all the variables into a simple structure and iterate a
table of header definitions to initialise everything.

Signed-Off-By: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
This commit is contained in:
Dave Chinner 2018-05-13 23:10:06 -07:00 committed by Darrick J. Wong
parent 0410c3bb2b
commit 532ff647d8
1 changed files with 92 additions and 90 deletions
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182
fs/xfs/xfs_fsops.c
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@ -282,12 +282,13 @@ xfs_agiblock_init(
agi->agi_unlinked[bucket] = cpu_to_be32(NULLAGINO);
}
typedef void (*aghdr_init_work_f)(struct xfs_mount *mp, struct xfs_buf *bp,
struct aghdr_init_data *id);
static int
xfs_growfs_init_aghdr(
struct xfs_mount *mp,
struct aghdr_init_data *id,
void (*work)(struct xfs_mount *, struct xfs_buf *,
struct aghdr_init_data *),
aghdr_init_work_f work,
const struct xfs_buf_ops *ops)
{
@ -304,6 +305,15 @@ xfs_growfs_init_aghdr(
return 0;
}
struct xfs_aghdr_grow_data {
xfs_daddr_t daddr;
size_t numblks;
const struct xfs_buf_ops *ops;
aghdr_init_work_f work;
xfs_btnum_t type;
bool need_init;
};
/*
* Write new AG headers to disk. Non-transactional, but written
* synchronously so they are completed prior to the growfs transaction
@ -315,101 +325,93 @@ xfs_grow_ag_headers(
struct aghdr_init_data *id)
{
struct xfs_aghdr_grow_data aghdr_data[] = {
{ /* AGF */
.daddr = XFS_AG_DADDR(mp, id->agno, XFS_AGF_DADDR(mp)),
.numblks = XFS_FSS_TO_BB(mp, 1),
.ops = &xfs_agf_buf_ops,
.work = &xfs_agfblock_init,
.need_init = true
},
{ /* AGFL */
.daddr = XFS_AG_DADDR(mp, id->agno, XFS_AGFL_DADDR(mp)),
.numblks = XFS_FSS_TO_BB(mp, 1),
.ops = &xfs_agfl_buf_ops,
.work = &xfs_agflblock_init,
.need_init = true
},
{ /* AGI */
.daddr = XFS_AG_DADDR(mp, id->agno, XFS_AGI_DADDR(mp)),
.numblks = XFS_FSS_TO_BB(mp, 1),
.ops = &xfs_agi_buf_ops,
.work = &xfs_agiblock_init,
.need_init = true
},
{ /* BNO root block */
.daddr = XFS_AGB_TO_DADDR(mp, id->agno, XFS_BNO_BLOCK(mp)),
.numblks = BTOBB(mp->m_sb.sb_blocksize),
.ops = &xfs_allocbt_buf_ops,
.work = &xfs_bnoroot_init,
.need_init = true
},
{ /* CNT root block */
.daddr = XFS_AGB_TO_DADDR(mp, id->agno, XFS_CNT_BLOCK(mp)),
.numblks = BTOBB(mp->m_sb.sb_blocksize),
.ops = &xfs_allocbt_buf_ops,
.work = &xfs_cntroot_init,
.need_init = true
},
{ /* INO root block */
.daddr = XFS_AGB_TO_DADDR(mp, id->agno, XFS_IBT_BLOCK(mp)),
.numblks = BTOBB(mp->m_sb.sb_blocksize),
.ops = &xfs_inobt_buf_ops,
.work = &xfs_btroot_init,
.type = XFS_BTNUM_INO,
.need_init = true
},
{ /* FINO root block */
.daddr = XFS_AGB_TO_DADDR(mp, id->agno, XFS_FIBT_BLOCK(mp)),
.numblks = BTOBB(mp->m_sb.sb_blocksize),
.ops = &xfs_inobt_buf_ops,
.work = &xfs_btroot_init,
.type = XFS_BTNUM_FINO,
.need_init = xfs_sb_version_hasfinobt(&mp->m_sb)
},
{ /* RMAP root block */
.daddr = XFS_AGB_TO_DADDR(mp, id->agno, XFS_RMAP_BLOCK(mp)),
.numblks = BTOBB(mp->m_sb.sb_blocksize),
.ops = &xfs_rmapbt_buf_ops,
.work = &xfs_rmaproot_init,
.need_init = xfs_sb_version_hasrmapbt(&mp->m_sb)
},
{ /* REFC root block */
.daddr = XFS_AGB_TO_DADDR(mp, id->agno, xfs_refc_block(mp)),
.numblks = BTOBB(mp->m_sb.sb_blocksize),
.ops = &xfs_refcountbt_buf_ops,
.work = &xfs_btroot_init,
.type = XFS_BTNUM_REFC,
.need_init = xfs_sb_version_hasreflink(&mp->m_sb)
},
{ /* NULL terminating block */
.daddr = XFS_BUF_DADDR_NULL,
}
};
struct xfs_aghdr_grow_data *dp;
int error = 0;
/* Account for AG free space in new AG */
id->nfree += id->agsize - mp->m_ag_prealloc_blocks;
for (dp = &aghdr_data[0]; dp->daddr != XFS_BUF_DADDR_NULL; dp++) {
if (!dp->need_init)
continue;
/* AG freespace header block */
id->daddr = XFS_AG_DADDR(mp, id->agno, XFS_AGF_DADDR(mp));
id->numblks = XFS_FSS_TO_BB(mp, 1);
error = xfs_growfs_init_aghdr(mp, id, xfs_agfblock_init,
&xfs_agf_buf_ops);
if (error)
goto out_error;
/* AG freelist header block */
id->daddr = XFS_AG_DADDR(mp, id->agno, XFS_AGFL_DADDR(mp));
id->numblks = XFS_FSS_TO_BB(mp, 1);
error = xfs_growfs_init_aghdr(mp, id, xfs_agflblock_init,
&xfs_agfl_buf_ops);
if (error)
goto out_error;
/* AG inode header block */
id->daddr = XFS_AG_DADDR(mp, id->agno, XFS_AGI_DADDR(mp));
id->numblks = XFS_FSS_TO_BB(mp, 1);
error = xfs_growfs_init_aghdr(mp, id, xfs_agiblock_init,
&xfs_agi_buf_ops);
if (error)
goto out_error;
/* BNO btree root block */
id->daddr = XFS_AGB_TO_DADDR(mp, id->agno, XFS_BNO_BLOCK(mp));
id->numblks = BTOBB(mp->m_sb.sb_blocksize);
error = xfs_growfs_init_aghdr(mp, id, xfs_bnoroot_init,
&xfs_allocbt_buf_ops);
if (error)
goto out_error;
/* CNT btree root block */
id->daddr = XFS_AGB_TO_DADDR(mp, id->agno, XFS_CNT_BLOCK(mp));
id->numblks = BTOBB(mp->m_sb.sb_blocksize);
error = xfs_growfs_init_aghdr(mp, id, xfs_cntroot_init,
&xfs_allocbt_buf_ops);
if (error)
goto out_error;
/* RMAP btree root block */
if (xfs_sb_version_hasrmapbt(&mp->m_sb)) {
id->daddr = XFS_AGB_TO_DADDR(mp, id->agno, XFS_RMAP_BLOCK(mp));
id->numblks = BTOBB(mp->m_sb.sb_blocksize);
error = xfs_growfs_init_aghdr(mp, id, xfs_rmaproot_init,
&xfs_rmapbt_buf_ops);
id->daddr = dp->daddr;
id->numblks = dp->numblks;
id->type = dp->type;
error = xfs_growfs_init_aghdr(mp, id, dp->work, dp->ops);
if (error)
goto out_error;
break;
}
/* INO btree root block */
id->daddr = XFS_AGB_TO_DADDR(mp, id->agno, XFS_IBT_BLOCK(mp));
id->numblks = BTOBB(mp->m_sb.sb_blocksize);
id->type = XFS_BTNUM_INO;
error = xfs_growfs_init_aghdr(mp, id, xfs_btroot_init,
&xfs_inobt_buf_ops);
if (error)
goto out_error;
/*
* FINO btree root block
*/
if (xfs_sb_version_hasfinobt(&mp->m_sb)) {
id->daddr = XFS_AGB_TO_DADDR(mp, id->agno, XFS_FIBT_BLOCK(mp));
id->numblks = BTOBB(mp->m_sb.sb_blocksize);
id->type = XFS_BTNUM_FINO;
error = xfs_growfs_init_aghdr(mp, id, xfs_btroot_init,
&xfs_inobt_buf_ops);
if (error)
goto out_error;
}
/*
* refcount btree root block
*/
if (xfs_sb_version_hasreflink(&mp->m_sb)) {
id->daddr = XFS_AGB_TO_DADDR(mp, id->agno, xfs_refc_block(mp));
id->numblks = BTOBB(mp->m_sb.sb_blocksize);
id->type = XFS_BTNUM_REFC;
error = xfs_growfs_init_aghdr(mp, id, xfs_btroot_init,
&xfs_refcountbt_buf_ops);
if (error)
goto out_error;
}
out_error:
return error;
}