From: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
Add support for btree staging cursors for the inode 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>
---
fs/xfs/libxfs/xfs_ialloc_btree.c | 80 +++++++++++++++++++++++++++++++++-----
fs/xfs/libxfs/xfs_ialloc_btree.h | 6 +++
2 files changed, 75 insertions(+), 11 deletions(-)
diff --git a/fs/xfs/libxfs/xfs_ialloc_btree.c b/fs/xfs/libxfs/xfs_ialloc_btree.c
index e0e8570af023..d7cf74a68578 100644
--- a/fs/xfs/libxfs/xfs_ialloc_btree.c
+++ b/fs/xfs/libxfs/xfs_ialloc_btree.c
@@ -400,32 +400,27 @@ static const struct xfs_btree_ops xfs_finobt_ops = {
};
/*
- * Allocate a new inode btree cursor.
+ * Initialize a new inode btree cursor.
*/
-struct xfs_btree_cur * /* new inode btree cursor */
-xfs_inobt_init_cursor(
+static struct xfs_btree_cur *
+xfs_inobt_init_common(
struct xfs_mount *mp, /* file system mount point */
struct xfs_trans *tp, /* transaction pointer */
- struct xfs_buf *agbp, /* buffer for agi structure */
xfs_agnumber_t agno, /* allocation group number */
xfs_btnum_t btnum) /* ialloc or free ino btree */
{
- struct xfs_agi *agi = agbp->b_addr;
struct xfs_btree_cur *cur;
cur = kmem_zone_zalloc(xfs_btree_cur_zone, KM_NOFS);
-
cur->bc_tp = tp;
cur->bc_mp = mp;
cur->bc_btnum = btnum;
if (btnum == XFS_BTNUM_INO) {
- cur->bc_nlevels = be32_to_cpu(agi->agi_level);
- cur->bc_ops = &xfs_inobt_ops;
cur->bc_statoff = XFS_STATS_CALC_INDEX(xs_ibt_2);
+ cur->bc_ops = &xfs_inobt_ops;
} else {
- cur->bc_nlevels = be32_to_cpu(agi->agi_free_level);
- cur->bc_ops = &xfs_finobt_ops;
cur->bc_statoff = XFS_STATS_CALC_INDEX(xs_fibt_2);
+ cur->bc_ops = &xfs_finobt_ops;
}
cur->bc_blocklog = mp->m_sb.sb_blocklog;
@@ -433,12 +428,75 @@ xfs_inobt_init_cursor(
if (xfs_sb_version_hascrc(&mp->m_sb))
cur->bc_flags |= XFS_BTREE_CRC_BLOCKS;
- cur->bc_ag.agbp = agbp;
cur->bc_ag.agno = agno;
+ return cur;
+}
+/* Create an inode btree cursor. */
+struct xfs_btree_cur *
+xfs_inobt_init_cursor(
+ struct xfs_mount *mp,
+ struct xfs_trans *tp,
+ struct xfs_buf *agbp,
+ xfs_agnumber_t agno,
+ xfs_btnum_t btnum)
+{
+ struct xfs_btree_cur *cur;
+ struct xfs_agi *agi = agbp->b_addr;
+
+ cur = xfs_inobt_init_common(mp, tp, agno, btnum);
+ if (btnum == XFS_BTNUM_INO)
+ cur->bc_nlevels = be32_to_cpu(agi->agi_level);
+ else
+ cur->bc_nlevels = be32_to_cpu(agi->agi_free_level);
+ cur->bc_ag.agbp = agbp;
return cur;
}
+/* Create an inode btree cursor with a fake root for staging. */
+struct xfs_btree_cur *
+xfs_inobt_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_inobt_init_common(mp, NULL, agno, btnum);
+ xfs_btree_stage_afakeroot(cur, afake, NULL);
+ return cur;
+}
+
+/*
+ * Install a new inobt btree root. Caller is responsible for invalidating
+ * and freeing the old btree blocks.
+ */
+void
+xfs_inobt_commit_staged_btree(
+ struct xfs_btree_cur *cur,
+ struct xfs_trans *tp,
+ struct xfs_buf *agbp)
+{
+ struct xfs_agi *agi = agbp->b_addr;
+ struct xbtree_afakeroot *afake = cur->bc_ag.afake;
+
+ ASSERT(cur->bc_flags & XFS_BTREE_STAGING);
+
+ if (cur->bc_btnum == XFS_BTNUM_INO) {
+ agi->agi_root = cpu_to_be32(afake->af_root);
+ agi->agi_level = cpu_to_be32(afake->af_levels);
+ xfs_ialloc_log_agi(tp, agbp, XFS_AGI_ROOT | XFS_AGI_LEVEL);
+ xfs_btree_commit_afakeroot(cur, tp, agbp, &xfs_inobt_ops);
+ } else {
+ agi->agi_free_root = cpu_to_be32(afake->af_root);
+ agi->agi_free_level = cpu_to_be32(afake->af_levels);
+ xfs_ialloc_log_agi(tp, agbp, XFS_AGI_FREE_ROOT |
+ XFS_AGI_FREE_LEVEL);
+ xfs_btree_commit_afakeroot(cur, tp, agbp, &xfs_finobt_ops);
+ }
+}
+
/*
* Calculate number of records in an inobt btree block.
*/
diff --git a/fs/xfs/libxfs/xfs_ialloc_btree.h b/fs/xfs/libxfs/xfs_ialloc_btree.h
index 951305ecaae1..35bbd978c272 100644
--- a/fs/xfs/libxfs/xfs_ialloc_btree.h
+++ b/fs/xfs/libxfs/xfs_ialloc_btree.h
@@ -48,6 +48,9 @@ struct xfs_mount;
extern struct xfs_btree_cur *xfs_inobt_init_cursor(struct xfs_mount *,
struct xfs_trans *, struct xfs_buf *, xfs_agnumber_t,
xfs_btnum_t);
+struct xfs_btree_cur *xfs_inobt_stage_cursor(struct xfs_mount *mp,
+ struct xbtree_afakeroot *afake, xfs_agnumber_t agno,
+ xfs_btnum_t btnum);
extern int xfs_inobt_maxrecs(struct xfs_mount *, int, int);
/* ir_holemask to inode allocation bitmap conversion */
@@ -68,4 +71,7 @@ int xfs_inobt_cur(struct xfs_mount *mp, struct xfs_trans *tp,
xfs_agnumber_t agno, xfs_btnum_t btnum,
struct xfs_btree_cur **curpp, struct xfs_buf **agi_bpp);
+void xfs_inobt_commit_staged_btree(struct xfs_btree_cur *cur,
+ struct xfs_trans *tp, struct xfs_buf *agbp);
+
#endif /* __XFS_IALLOC_BTREE_H__ */
