Commit 59d67712 authored by Darrick J. Wong's avatar Darrick J. Wong

xfs: add support for rmap btree staging cursors

Add support for btree staging cursors for the rmap btrees.  This is
needed both for online repair and also to convert xfs_repair to use
btree bulk loading.
Signed-off-by: default avatarDarrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: default avatarBrian Foster <bfoster@redhat.com>
parent 56e98164
......@@ -14,6 +14,7 @@
#include "xfs_trans.h"
#include "xfs_alloc.h"
#include "xfs_btree.h"
#include "xfs_btree_staging.h"
#include "xfs_rmap.h"
#include "xfs_rmap_btree.h"
#include "xfs_trace.h"
......@@ -448,17 +449,12 @@ static const struct xfs_btree_ops xfs_rmapbt_ops = {
.recs_inorder = xfs_rmapbt_recs_inorder,
};
/*
* Allocate a new allocation btree cursor.
*/
struct xfs_btree_cur *
xfs_rmapbt_init_cursor(
static struct xfs_btree_cur *
xfs_rmapbt_init_common(
struct xfs_mount *mp,
struct xfs_trans *tp,
struct xfs_buf *agbp,
xfs_agnumber_t agno)
{
struct xfs_agf *agf = agbp->b_addr;
struct xfs_btree_cur *cur;
cur = kmem_zone_zalloc(xfs_btree_cur_zone, KM_NOFS);
......@@ -468,16 +464,67 @@ xfs_rmapbt_init_cursor(
cur->bc_btnum = XFS_BTNUM_RMAP;
cur->bc_flags = XFS_BTREE_CRC_BLOCKS | XFS_BTREE_OVERLAPPING;
cur->bc_blocklog = mp->m_sb.sb_blocklog;
cur->bc_ops = &xfs_rmapbt_ops;
cur->bc_nlevels = be32_to_cpu(agf->agf_levels[XFS_BTNUM_RMAP]);
cur->bc_statoff = XFS_STATS_CALC_INDEX(xs_rmap_2);
cur->bc_ag.agno = agno;
cur->bc_ops = &xfs_rmapbt_ops;
return cur;
}
/* Create a new reverse mapping btree cursor. */
struct xfs_btree_cur *
xfs_rmapbt_init_cursor(
struct xfs_mount *mp,
struct xfs_trans *tp,
struct xfs_buf *agbp,
xfs_agnumber_t agno)
{
struct xfs_agf *agf = agbp->b_addr;
struct xfs_btree_cur *cur;
cur = xfs_rmapbt_init_common(mp, tp, agno);
cur->bc_nlevels = be32_to_cpu(agf->agf_levels[XFS_BTNUM_RMAP]);
cur->bc_ag.agbp = agbp;
cur->bc_ag.agno = agno;
return cur;
}
/* Create a new reverse mapping btree cursor with a fake root for staging. */
struct xfs_btree_cur *
xfs_rmapbt_stage_cursor(
struct xfs_mount *mp,
struct xbtree_afakeroot *afake,
xfs_agnumber_t agno)
{
struct xfs_btree_cur *cur;
cur = xfs_rmapbt_init_common(mp, NULL, agno);
xfs_btree_stage_afakeroot(cur, afake);
return cur;
}
/*
* Install a new reverse mapping btree root. Caller is responsible for
* invalidating and freeing the old btree blocks.
*/
void
xfs_rmapbt_commit_staged_btree(
struct xfs_btree_cur *cur,
struct xfs_trans *tp,
struct xfs_buf *agbp)
{
struct xfs_agf *agf = agbp->b_addr;
struct xbtree_afakeroot *afake = cur->bc_ag.afake;
ASSERT(cur->bc_flags & XFS_BTREE_STAGING);
agf->agf_roots[cur->bc_btnum] = cpu_to_be32(afake->af_root);
agf->agf_levels[cur->bc_btnum] = cpu_to_be32(afake->af_levels);
agf->agf_rmap_blocks = cpu_to_be32(afake->af_blocks);
xfs_alloc_log_agf(tp, agbp, XFS_AGF_ROOTS | XFS_AGF_LEVELS |
XFS_AGF_RMAP_BLOCKS);
xfs_btree_commit_afakeroot(cur, tp, agbp, &xfs_rmapbt_ops);
}
/*
* Calculate number of records in an rmap btree block.
*/
......
......@@ -9,6 +9,7 @@
struct xfs_buf;
struct xfs_btree_cur;
struct xfs_mount;
struct xbtree_afakeroot;
/* rmaps only exist on crc enabled filesystems */
#define XFS_RMAP_BLOCK_LEN XFS_BTREE_SBLOCK_CRC_LEN
......@@ -43,6 +44,10 @@ struct xfs_mount;
struct xfs_btree_cur *xfs_rmapbt_init_cursor(struct xfs_mount *mp,
struct xfs_trans *tp, struct xfs_buf *bp,
xfs_agnumber_t agno);
struct xfs_btree_cur *xfs_rmapbt_stage_cursor(struct xfs_mount *mp,
struct xbtree_afakeroot *afake, xfs_agnumber_t agno);
void xfs_rmapbt_commit_staged_btree(struct xfs_btree_cur *cur,
struct xfs_trans *tp, struct xfs_buf *agbp);
int xfs_rmapbt_maxrecs(int blocklen, int leaf);
extern void xfs_rmapbt_compute_maxlevels(struct xfs_mount *mp);
......
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