From: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
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: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
---
v2: leave the LASTREC_UPDATE flag setting alone
---
fs/xfs/libxfs/xfs_alloc_btree.c | 93 ++++++++++++++++++++++++++++++++-------
fs/xfs/libxfs/xfs_alloc_btree.h | 7 +++
2 files changed, 84 insertions(+), 16 deletions(-)
diff --git a/fs/xfs/libxfs/xfs_alloc_btree.c b/fs/xfs/libxfs/xfs_alloc_btree.c
index a28041fdf4c0..60c453cb3ee3 100644
--- a/fs/xfs/libxfs/xfs_alloc_btree.c
+++ b/fs/xfs/libxfs/xfs_alloc_btree.c
@@ -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.
*/
diff --git a/fs/xfs/libxfs/xfs_alloc_btree.h b/fs/xfs/libxfs/xfs_alloc_btree.h
index c9305ebb69f6..047f09f0be3c 100644
--- a/fs/xfs/libxfs/xfs_alloc_btree.h
+++ b/fs/xfs/libxfs/xfs_alloc_btree.h
@@ -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__ */
