Commit e6eb33d9 authored by Darrick J. Wong's avatar Darrick J. Wong
Browse files

xfs: add support for free space btree staging cursors 



Add support for btree staging cursors for the free space 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 60e3d707

fs/xfs/libxfs/xfs_alloc_btree.c

+77 −16
Original line number Diff line number Diff line
@@ -12,6 +12,7 @@ 
#include "xfs_sb.h"

#include "xfs_mount.h"

#include "xfs_btree.h"

#include "xfs_btree_staging.h"

#include "xfs_alloc_btree.h"

#include "xfs_alloc.h"

#include "xfs_extent_busy.h"
@@ -471,18 +472,14 @@ static const struct xfs_btree_ops xfs_cntbt_ops = { 
	.recs_inorder		= xfs_cntbt_recs_inorder,

};



/*

 * Allocate a new allocation btree cursor.

 */

struct xfs_btree_cur *			/* new alloc btree cursor */

xfs_allocbt_init_cursor(

	struct xfs_mount	*mp,		/* file system mount point */

	struct xfs_trans	*tp,		/* transaction pointer */

	struct xfs_buf		*agbp,		/* buffer for agf structure */

	xfs_agnumber_t		agno,		/* allocation group number */

	xfs_btnum_t		btnum)		/* btree identifier */

/* Allocate most of a new allocation btree cursor. */

STATIC struct xfs_btree_cur *

xfs_allocbt_init_common(

	struct xfs_mount	*mp,

	struct xfs_trans	*tp,

	xfs_agnumber_t		agno,

	xfs_btnum_t		btnum)

{

	struct xfs_agf		*agf = agbp->b_addr;

	struct xfs_btree_cur	*cur;



	ASSERT(btnum == XFS_BTNUM_BNO || btnum == XFS_BTNUM_CNT);
@@ -495,17 +492,14 @@ xfs_allocbt_init_cursor( 
	cur->bc_blocklog = mp->m_sb.sb_blocklog;



	if (btnum == XFS_BTNUM_CNT) {

		cur->bc_statoff = XFS_STATS_CALC_INDEX(xs_abtc_2);

		cur->bc_ops = &xfs_cntbt_ops;

		cur->bc_nlevels = be32_to_cpu(agf->agf_levels[XFS_BTNUM_CNT]);

		cur->bc_statoff = XFS_STATS_CALC_INDEX(xs_abtc_2);

		cur->bc_flags = XFS_BTREE_LASTREC_UPDATE;

	} else {

		cur->bc_statoff = XFS_STATS_CALC_INDEX(xs_abtb_2);

		cur->bc_ops = &xfs_bnobt_ops;

		cur->bc_nlevels = be32_to_cpu(agf->agf_levels[XFS_BTNUM_BNO]);

		cur->bc_statoff = XFS_STATS_CALC_INDEX(xs_abtb_2);

	}



	cur->bc_ag.agbp = agbp;

	cur->bc_ag.agno = agno;

	cur->bc_ag.abt.active = false;
@@ -515,6 +509,73 @@ xfs_allocbt_init_cursor( 
	return cur;

}



/*

 * Allocate a new allocation btree cursor.

 */

struct xfs_btree_cur *			/* new alloc btree cursor */

xfs_allocbt_init_cursor(

	struct xfs_mount	*mp,		/* file system mount point */

	struct xfs_trans	*tp,		/* transaction pointer */

	struct xfs_buf		*agbp,		/* buffer for agf structure */

	xfs_agnumber_t		agno,		/* allocation group number */

	xfs_btnum_t		btnum)		/* btree identifier */

{

	struct xfs_agf		*agf = agbp->b_addr;

	struct xfs_btree_cur	*cur;



	cur = xfs_allocbt_init_common(mp, tp, agno, btnum);

	if (btnum == XFS_BTNUM_CNT)

		cur->bc_nlevels = be32_to_cpu(agf->agf_levels[XFS_BTNUM_CNT]);

	else

		cur->bc_nlevels = be32_to_cpu(agf->agf_levels[XFS_BTNUM_BNO]);



	cur->bc_ag.agbp = agbp;



	return cur;

}



/* Create a free space btree cursor with a fake root for staging. */

struct xfs_btree_cur *

xfs_allocbt_stage_cursor(

	struct xfs_mount	*mp,

	struct xbtree_afakeroot	*afake,

	xfs_agnumber_t		agno,

	xfs_btnum_t		btnum)

{

	struct xfs_btree_cur	*cur;



	cur = xfs_allocbt_init_common(mp, NULL, agno, btnum);

	xfs_btree_stage_afakeroot(cur, afake);

	return cur;

}



/*

 * Install a new free space btree root.  Caller is responsible for invalidating

 * and freeing the old btree blocks.

 */

void

xfs_allocbt_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);

	xfs_alloc_log_agf(tp, agbp, XFS_AGF_ROOTS | XFS_AGF_LEVELS);



	if (cur->bc_btnum == XFS_BTNUM_BNO) {

		xfs_btree_commit_afakeroot(cur, tp, agbp, &xfs_bnobt_ops);

	} else {

		cur->bc_flags |= XFS_BTREE_LASTREC_UPDATE;

		xfs_btree_commit_afakeroot(cur, tp, agbp, &xfs_cntbt_ops);

	}

}



/*

 * Calculate number of records in an alloc btree block.

 */

fs/xfs/libxfs/xfs_alloc_btree.h

+7 −0
Original line number Diff line number Diff line
@@ -13,6 +13,7 @@ 
struct xfs_buf;

struct xfs_btree_cur;

struct xfs_mount;

struct xbtree_afakeroot;



/*

 * Btree block header size depends on a superblock flag.
@@ -48,8 +49,14 @@ struct xfs_mount; 
extern struct xfs_btree_cur *xfs_allocbt_init_cursor(struct xfs_mount *,

		struct xfs_trans *, struct xfs_buf *,

		xfs_agnumber_t, xfs_btnum_t);

struct xfs_btree_cur *xfs_allocbt_stage_cursor(struct xfs_mount *mp,

		struct xbtree_afakeroot *afake, xfs_agnumber_t agno,

		xfs_btnum_t btnum);

extern int xfs_allocbt_maxrecs(struct xfs_mount *, int, int);

extern xfs_extlen_t xfs_allocbt_calc_size(struct xfs_mount *mp,

		unsigned long long len);



void xfs_allocbt_commit_staged_btree(struct xfs_btree_cur *cur,

		struct xfs_trans *tp, struct xfs_buf *agbp);



#endif	/* __XFS_ALLOC_BTREE_H__ */

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