Plumb in the pieces necessary to check the rmap btree.
Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
---
fs/xfs/libxfs/xfs_fs.h | 3 +
fs/xfs/libxfs/xfs_rmap.c | 3 +
fs/xfs/libxfs/xfs_rmap.h | 3 +
fs/xfs/libxfs/xfs_rmap_btree.c | 4 --
fs/xfs/xfs_scrub.c | 84 ++++++++++++++++++++++++++++++++++++++++
5 files changed, 91 insertions(+), 6 deletions(-)
diff --git a/fs/xfs/libxfs/xfs_fs.h b/fs/xfs/libxfs/xfs_fs.h
index 6b8ff75..31e091c 100644
--- a/fs/xfs/libxfs/xfs_fs.h
+++ b/fs/xfs/libxfs/xfs_fs.h
@@ -543,7 +543,8 @@ struct xfs_scrub_metadata {
#define XFS_SCRUB_TYPE_CNTBT 5 /* freesp by length btree */
#define XFS_SCRUB_TYPE_INOBT 6 /* inode btree */
#define XFS_SCRUB_TYPE_FINOBT 7 /* free inode btree */
-#define XFS_SCRUB_TYPE_MAX 7
+#define XFS_SCRUB_TYPE_RMAPBT 8 /* reverse mapping btree */
+#define XFS_SCRUB_TYPE_MAX 8
#define XFS_SCRUB_FLAGS_ALL 0x0 /* no flags yet */
diff --git a/fs/xfs/libxfs/xfs_rmap.c b/fs/xfs/libxfs/xfs_rmap.c
index 3a8cc71..b0308fc 100644
--- a/fs/xfs/libxfs/xfs_rmap.c
+++ b/fs/xfs/libxfs/xfs_rmap.c
@@ -179,7 +179,8 @@ done:
return error;
}
-static int
+/* Convert an internal btree record to an rmap record. */
+int
xfs_rmap_btrec_to_irec(
union xfs_btree_rec *rec,
struct xfs_rmap_irec *irec)
diff --git a/fs/xfs/libxfs/xfs_rmap.h b/fs/xfs/libxfs/xfs_rmap.h
index 7899305..188db38 100644
--- a/fs/xfs/libxfs/xfs_rmap.h
+++ b/fs/xfs/libxfs/xfs_rmap.h
@@ -212,5 +212,8 @@ int xfs_rmap_find_left_neighbor(struct xfs_btree_cur *cur, xfs_agblock_t bno,
int xfs_rmap_lookup_le_range(struct xfs_btree_cur *cur, xfs_agblock_t bno,
uint64_t owner, uint64_t offset, unsigned int flags,
struct xfs_rmap_irec *irec, int *stat);
+union xfs_btree_rec;
+int xfs_rmap_btrec_to_irec(union xfs_btree_rec *rec,
+ struct xfs_rmap_irec *irec);
#endif /* __XFS_RMAP_H__ */
diff --git a/fs/xfs/libxfs/xfs_rmap_btree.c b/fs/xfs/libxfs/xfs_rmap_btree.c
index 385c2ac..f4c776d 100644
--- a/fs/xfs/libxfs/xfs_rmap_btree.c
+++ b/fs/xfs/libxfs/xfs_rmap_btree.c
@@ -377,7 +377,6 @@ const struct xfs_buf_ops xfs_rmapbt_buf_ops = {
.verify_write = xfs_rmapbt_write_verify,
};
-#if defined(DEBUG) || defined(XFS_WARN)
STATIC int
xfs_rmapbt_keys_inorder(
struct xfs_btree_cur *cur,
@@ -437,7 +436,6 @@ xfs_rmapbt_recs_inorder(
return 1;
return 0;
}
-#endif /* DEBUG */
static const struct xfs_btree_ops xfs_rmapbt_ops = {
.rec_len = sizeof(struct xfs_rmap_rec),
@@ -456,10 +454,8 @@ static const struct xfs_btree_ops xfs_rmapbt_ops = {
.key_diff = xfs_rmapbt_key_diff,
.buf_ops = &xfs_rmapbt_buf_ops,
.diff_two_keys = xfs_rmapbt_diff_two_keys,
-#if defined(DEBUG) || defined(XFS_WARN)
.keys_inorder = xfs_rmapbt_keys_inorder,
.recs_inorder = xfs_rmapbt_recs_inorder,
-#endif
};
/*
diff --git a/fs/xfs/xfs_scrub.c b/fs/xfs/xfs_scrub.c
index 81d24f5..d155c52 100644
--- a/fs/xfs/xfs_scrub.c
+++ b/fs/xfs/xfs_scrub.c
@@ -1164,6 +1164,89 @@ xfs_scrub_finobt(
return xfs_scrub_iallocbt(ip->i_mount, sm, XFS_BTNUM_FINO);
}
+/* Reverse-mapping scrubber. */
+
+/* Scrub an rmapbt record. */
+STATIC int
+xfs_scrub_rmapbt_helper(
+ struct xfs_scrub_btree *bs,
+ union xfs_btree_rec *rec)
+{
+ struct xfs_mount *mp = bs->cur->bc_mp;
+ struct xfs_agf *agf;
+ struct xfs_rmap_irec irec;
+ xfs_agblock_t eoag;
+ bool non_inode;
+ bool is_unwritten;
+ bool is_bmbt;
+ bool is_attr;
+ int error;
+
+ error = xfs_rmap_btrec_to_irec(rec, &irec);
+ if (error)
+ return error;
+
+ agf = XFS_BUF_TO_AGF(bs->agf_bp);
+ eoag = be32_to_cpu(agf->agf_length);
+ XFS_BTREC_SCRUB_CHECK(bs, irec.rm_startblock < mp->m_sb.sb_agblocks)
+ XFS_BTREC_SCRUB_CHECK(bs, irec.rm_startblock < eoag);
+ XFS_BTREC_SCRUB_CHECK(bs, irec.rm_startblock < irec.rm_startblock +
+ irec.rm_blockcount);
+ XFS_BTREC_SCRUB_CHECK(bs, irec.rm_startblock + irec.rm_blockcount <=
+ mp->m_sb.sb_agblocks)
+ XFS_BTREC_SCRUB_CHECK(bs, irec.rm_startblock + irec.rm_blockcount <=
+ eoag);
+
+ non_inode = XFS_RMAP_NON_INODE_OWNER(irec.rm_owner);
+ is_bmbt = irec.rm_flags & XFS_RMAP_BMBT_BLOCK;
+ is_attr = irec.rm_flags & XFS_RMAP_ATTR_FORK;
+ is_unwritten = irec.rm_flags & XFS_RMAP_UNWRITTEN;
+
+ XFS_BTREC_SCRUB_CHECK(bs, !is_bmbt || irec.rm_offset == 0);
+ XFS_BTREC_SCRUB_CHECK(bs, !non_inode || irec.rm_offset == 0);
+ XFS_BTREC_SCRUB_CHECK(bs, !is_unwritten || !(is_bmbt || non_inode ||
+ is_attr));
+ XFS_BTREC_SCRUB_CHECK(bs, !non_inode || !(is_bmbt || is_unwritten ||
+ is_attr));
+
+ /* XXX: check with the owner */
+
+ return error;
+}
+
+/* Scrub the rmap btree for some AG. */
+STATIC int
+xfs_scrub_rmapbt(
+ struct xfs_inode *ip,
+ struct xfs_scrub_metadata *sm)
+{
+ struct xfs_mount *mp = ip->i_mount;
+ struct xfs_scrub_btree bs;
+ xfs_agnumber_t agno;
+ int error;
+
+ if (sm->control >= mp->m_sb.sb_agcount || sm->flags)
+ return -EINVAL;
+ agno = sm->control;
+
+ error = xfs_scrub_btree_get_ag_headers(mp, &bs, agno);
+ if (error)
+ return error;
+
+ bs.cur = xfs_rmapbt_init_cursor(mp, NULL, bs.agf_bp, agno);
+ bs.scrub_rec = xfs_scrub_rmapbt_helper;
+ xfs_rmap_ag_owner(&bs.oinfo, XFS_RMAP_OWN_AG);
+ error = xfs_scrub_btree(&bs);
+ xfs_btree_del_cursor(bs.cur,
+ error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR);
+ xfs_scrub_btree_put_ag_headers(&bs);
+
+ if (!error && bs.error)
+ error = bs.error;
+
+ return error;
+}
+
/* Scrubbing dispatch. */
struct xfs_scrub_meta_fns {
@@ -1180,6 +1263,7 @@ static const struct xfs_scrub_meta_fns meta_scrub_fns[] = {
{xfs_scrub_cntbt, NULL},
{xfs_scrub_inobt, NULL},
{xfs_scrub_finobt, xfs_sb_version_hasfinobt},
+ {xfs_scrub_rmapbt, xfs_sb_version_hasrmapbt},
};
/* Dispatch metadata scrubbing. */
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