Add reverse-mappings for fixed-location per-AG metadata such as inode
chunks, superblocks, and the log to the raw rmap list, then merge the
raw rmap data (which also has the BMBT data) into the main rmap list.
v2: Support sparse inode chunks.
Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
---
repair/phase4.c | 41 +++++++++++++++++++++++++
repair/rmap.c | 92 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
repair/rmap.h | 2 +
3 files changed, 135 insertions(+)
diff --git a/repair/phase4.c b/repair/phase4.c
index b4264df..8880c91 100644
--- a/repair/phase4.c
+++ b/repair/phase4.c
@@ -157,6 +157,40 @@ process_ags(
do_inode_prefetch(mp, ag_stride, process_ag_func, true, false);
}
+static void
+check_rmap_btrees(
+ work_queue_t *wq,
+ xfs_agnumber_t agno,
+ void *arg)
+{
+ int error;
+
+ error = add_fixed_ag_rmap_data(wq->mp, agno);
+ if (error)
+ do_error(
+_("unable to add AG %u metadata reverse-mapping data.\n"), agno);
+
+ error = fold_raw_rmaps(wq->mp, agno);
+ if (error)
+ do_error(
+_("unable to merge AG %u metadata reverse-mapping data.\n"), agno);
+}
+
+static void
+process_rmap_data(
+ struct xfs_mount *mp)
+{
+ struct work_queue wq;
+ xfs_agnumber_t i;
+
+ if (!needs_rmap_work(mp))
+ return;
+
+ create_work_queue(&wq, mp, libxfs_nproc());
+ for (i = 0; i < mp->m_sb.sb_agcount; i++)
+ queue_work(&wq, check_rmap_btrees, i, NULL);
+ destroy_work_queue(&wq);
+}
void
phase4(xfs_mount_t *mp)
@@ -306,6 +340,13 @@ phase4(xfs_mount_t *mp)
* already in phase 3.
*/
process_ags(mp);
+
+ /*
+ * Process all the reverse-mapping data that we collected. This
+ * involves checking the rmap data against the btree.
+ */
+ process_rmap_data(mp);
+
print_final_rpt();
/*
diff --git a/repair/rmap.c b/repair/rmap.c
index e30e99b..8f532fb 100644
--- a/repair/rmap.c
+++ b/repair/rmap.c
@@ -331,6 +331,98 @@ err:
return error;
}
+static int
+find_first_zero_bit(
+ __uint64_t mask)
+{
+ int n;
+ int b = 0;
+
+ for (n = 0; n < sizeof(mask) * NBBY && (mask & 1); n++, mask >>= 1)
+ b++;
+
+ return b;
+}
+
+static int
+popcnt(
+ __uint64_t mask)
+{
+ int n;
+ int b = 0;
+
+ if (mask == 0)
+ return 0;
+
+ for (n = 0; n < sizeof(mask) * NBBY; n++, mask >>= 1)
+ if (mask & 1)
+ b++;
+
+ return b;
+}
+
+/*
+ * Add an allocation group's fixed metadata to the rmap list. This includes
+ * sb/agi/agf/agfl headers, inode chunks, and the log.
+ */
+int
+add_fixed_ag_rmap_data(
+ struct xfs_mount *mp,
+ xfs_agnumber_t agno)
+{
+ xfs_fsblock_t fsbno;
+ xfs_agblock_t agbno;
+ ino_tree_node_t *ino_rec;
+ xfs_agino_t agino;
+ int error;
+ int startidx;
+ int nr;
+
+ if (!needs_rmap_work(mp))
+ return 0;
+
+ /* sb/agi/agf/agfl headers */
+ error = add_ag_rmap(mp, agno, 0, XFS_BNO_BLOCK(mp),
+ XFS_RMAP_OWN_FS);
+ if (error)
+ goto out;
+
+ /* inodes */
+ ino_rec = findfirst_inode_rec(agno);
+ for (; ino_rec != NULL; ino_rec = next_ino_rec(ino_rec)) {
+ if (xfs_sb_version_hassparseinodes(&mp->m_sb)) {
+ startidx = find_first_zero_bit(ino_rec->ir_sparse);
+ nr = XFS_INODES_PER_CHUNK - popcnt(ino_rec->ir_sparse);
+ } else {
+ startidx = 0;
+ nr = XFS_INODES_PER_CHUNK;
+ }
+ nr /= mp->m_sb.sb_inopblock;
+ if (nr == 0)
+ nr = 1;
+ agino = ino_rec->ino_startnum + startidx;
+ agbno = XFS_AGINO_TO_AGBNO(mp, agino);
+ if (XFS_AGINO_TO_OFFSET(mp, agino) == 0) {
+ error = add_ag_rmap(mp, agno, agbno, nr,
+ XFS_RMAP_OWN_INODES);
+ if (error)
+ goto out;
+ }
+ }
+
+ /* log */
+ fsbno = mp->m_sb.sb_logstart;
+ if (fsbno && XFS_FSB_TO_AGNO(mp, fsbno) == agno) {
+ agbno = XFS_FSB_TO_AGBNO(mp, mp->m_sb.sb_logstart);
+ error = add_ag_rmap(mp, agno, agbno, mp->m_sb.sb_logblocks,
+ XFS_RMAP_OWN_LOG);
+ if (error)
+ goto out;
+ }
+out:
+ return error;
+}
+
#ifdef RMAP_DEBUG
static void
dump_rmap(
diff --git a/repair/rmap.h b/repair/rmap.h
index 6a3a0a4..f948f25 100644
--- a/repair/rmap.h
+++ b/repair/rmap.h
@@ -34,4 +34,6 @@ extern int add_bmbt_rmap(struct xfs_mount *, xfs_ino_t, int,
xfs_fsblock_t);
extern int fold_raw_rmaps(struct xfs_mount *mp, xfs_agnumber_t agno);
extern bool mergeable_rmaps(struct xfs_rmap_irec *r1, struct xfs_rmap_irec
*r2);
+extern int add_fixed_ag_rmap_data(struct xfs_mount *, xfs_agnumber_t);
+
#endif /* RMAP_H_ */
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