@@ -127,6 +127,7 @@ xfs_scrub_superblock_xref(
xfs_scrub_xref_is_not_inode_chunk(sc, agbno, 1);
xfs_rmap_ag_owner(&oinfo, XFS_RMAP_OWN_FS);
xfs_scrub_xref_is_owned_by(sc, agbno, 1, &oinfo);
+ xfs_scrub_xref_is_not_shared(sc, agbno, 1);
/* scrub teardown will take care of sc->sa for us */
}
@@ -537,6 +538,25 @@ xfs_scrub_agf_xref_btreeblks(
xfs_scrub_block_xref_set_corrupt(sc, sc->sa.agf_bp);
}
+/* Check agf_refcount_blocks against tree size */
+static inline void
+xfs_scrub_agf_xref_refcblks(
+ struct xfs_scrub_context *sc)
+{
+ struct xfs_agf *agf = XFS_BUF_TO_AGF(sc->sa.agf_bp);
+ xfs_agblock_t blocks;
+ int error;
+
+ if (!sc->sa.refc_cur)
+ return;
+
+ error = xfs_btree_count_blocks(sc->sa.refc_cur, &blocks);
+ if (!xfs_scrub_should_check_xref(sc, &error, &sc->sa.refc_cur))
+ return;
+ if (blocks != be32_to_cpu(agf->agf_refcount_blocks))
+ xfs_scrub_block_xref_set_corrupt(sc, sc->sa.agf_bp);
+}
+
/* Cross-reference with the other btrees. */
STATIC void
xfs_scrub_agf_xref(
@@ -563,6 +583,8 @@ xfs_scrub_agf_xref(
xfs_rmap_ag_owner(&oinfo, XFS_RMAP_OWN_FS);
xfs_scrub_xref_is_owned_by(sc, agbno, 1, &oinfo);
xfs_scrub_agf_xref_btreeblks(sc);
+ xfs_scrub_xref_is_not_shared(sc, agbno, 1);
+ xfs_scrub_agf_xref_refcblks(sc);
/* scrub teardown will take care of sc->sa for us */
}
@@ -672,6 +694,7 @@ xfs_scrub_agfl_block_xref(
xfs_scrub_xref_is_used_space(sc, agbno, 1);
xfs_scrub_xref_is_not_inode_chunk(sc, agbno, 1);
xfs_scrub_xref_is_owned_by(sc, agbno, 1, oinfo);
+ xfs_scrub_xref_is_not_shared(sc, agbno, 1);
}
/* Scrub an AGFL block. */
@@ -730,6 +753,7 @@ xfs_scrub_agfl_xref(
xfs_scrub_xref_is_not_inode_chunk(sc, agbno, 1);
xfs_rmap_ag_owner(&oinfo, XFS_RMAP_OWN_FS);
xfs_scrub_xref_is_owned_by(sc, agbno, 1, &oinfo);
+ xfs_scrub_xref_is_not_shared(sc, agbno, 1);
/*
* Scrub teardown will take care of sc->sa for us. Leave sc->sa
@@ -850,6 +874,7 @@ xfs_scrub_agi_xref(
xfs_scrub_agi_xref_icounts(sc);
xfs_rmap_ag_owner(&oinfo, XFS_RMAP_OWN_FS);
xfs_scrub_xref_is_owned_by(sc, agbno, 1, &oinfo);
+ xfs_scrub_xref_is_not_shared(sc, agbno, 1);
/* scrub teardown will take care of sc->sa for us */
}
@@ -106,6 +106,7 @@ xfs_scrub_allocbt_xref(
xfs_scrub_allocbt_xref_other(sc, agbno, len);
xfs_scrub_xref_is_not_inode_chunk(sc, agbno, len);
xfs_scrub_xref_has_no_owner(sc, agbno, len);
+ xfs_scrub_xref_is_not_shared(sc, agbno, len);
}
/* Scrub a bnobt/cntbt record. */
@@ -37,6 +37,7 @@
#include "xfs_bmap_util.h"
#include "xfs_bmap_btree.h"
#include "xfs_rmap.h"
+#include "xfs_refcount.h"
#include "scrub/xfs_scrub.h"
#include "scrub/scrub.h"
#include "scrub/common.h"
@@ -273,6 +274,20 @@ xfs_scrub_bmap_extent_xref(
xfs_scrub_xref_is_used_space(info->sc, agbno, len);
xfs_scrub_xref_is_not_inode_chunk(info->sc, agbno, len);
xfs_scrub_bmap_xref_rmap(info, irec, agbno);
+ switch (info->whichfork) {
+ case XFS_DATA_FORK:
+ if (xfs_is_reflink_inode(info->sc->ip))
+ break;
+ /* fall through */
+ case XFS_ATTR_FORK:
+ xfs_scrub_xref_is_not_shared(info->sc, agbno,
+ irec->br_blockcount);
+ break;
+ case XFS_COW_FORK:
+ xfs_scrub_xref_is_cow_staging(info->sc, agbno,
+ irec->br_blockcount);
+ break;
+ }
xfs_scrub_ag_free(info->sc, &info->sc->sa);
}
@@ -105,6 +105,7 @@ xfs_scrub_iallocbt_chunk_xref(
xfs_scrub_iallocbt_chunk_xref_other(sc, irec, agino);
xfs_rmap_ag_owner(&oinfo, XFS_RMAP_OWN_INODES);
xfs_scrub_xref_is_owned_by(sc, agbno, len, &oinfo);
+ xfs_scrub_xref_is_not_shared(sc, agbno, len);
}
/* Is this chunk worth checking? */
@@ -652,22 +652,50 @@ xfs_scrub_inode_xref(
xfs_scrub_inode_xref_finobt(sc, ino);
xfs_rmap_ag_owner(&oinfo, XFS_RMAP_OWN_INODES);
xfs_scrub_xref_is_owned_by(sc, agbno, 1, &oinfo);
+ xfs_scrub_xref_is_not_shared(sc, agbno, 1);
xfs_scrub_ag_free(sc, &sc->sa);
}
+/*
+ * If the reflink iflag disagrees with a scan for shared data fork extents,
+ * either flag an error (shared extents w/ no flag) or a preen (flag set w/o
+ * any shared extents). We already checked for reflink iflag set on a non
+ * reflink filesystem.
+ */
+static void
+xfs_scrub_inode_check_reflink_iflag(
+ struct xfs_scrub_context *sc,
+ xfs_ino_t ino,
+ struct xfs_buf *bp)
+{
+ struct xfs_mount *mp = sc->mp;
+ bool has_shared;
+ int error;
+
+ if (!xfs_sb_version_hasreflink(&mp->m_sb))
+ return;
+
+ error = xfs_reflink_inode_has_shared_extents(sc->tp, sc->ip,
+ &has_shared);
+ if (!xfs_scrub_xref_process_error(sc, XFS_INO_TO_AGNO(mp, ino),
+ XFS_INO_TO_AGBNO(mp, ino), &error))
+ return;
+ if (xfs_is_reflink_inode(sc->ip) && !has_shared)
+ xfs_scrub_ino_set_preen(sc, ino, bp);
+ else if (!xfs_is_reflink_inode(sc->ip) && has_shared)
+ xfs_scrub_ino_set_corrupt(sc, ino, bp);
+}
+
/* Scrub an inode. */
int
xfs_scrub_inode(
struct xfs_scrub_context *sc)
{
struct xfs_dinode di;
- struct xfs_mount *mp = sc->mp;
struct xfs_buf *bp = NULL;
struct xfs_dinode *dip;
xfs_ino_t ino;
-
- bool has_shared;
int error = 0;
/* Did we get the in-core inode, or are we doing this manually? */
@@ -692,18 +720,12 @@ xfs_scrub_inode(
goto out;
/*
- * Does this inode have the reflink flag set but no shared extents?
- * Set the preening flag if this is the case.
+ * Look for discrepancies between file's data blocks and the reflink
+ * iflag. We already checked the iflag against the file mode when
+ * we scrubbed the dinode.
*/
- if (xfs_is_reflink_inode(sc->ip)) {
- error = xfs_reflink_inode_has_shared_extents(sc->tp, sc->ip,
- &has_shared);
- if (!xfs_scrub_xref_process_error(sc, XFS_INO_TO_AGNO(mp, ino),
- XFS_INO_TO_AGBNO(mp, ino), &error))
- goto out;
- if (!has_shared)
- xfs_scrub_ino_set_preen(sc, ino, bp);
- }
+ if (S_ISREG(VFS_I(sc->ip)->i_mode))
+ xfs_scrub_inode_check_reflink_iflag(sc, ino, bp);
xfs_scrub_inode_xref(sc, ino, dip);
out:
@@ -31,6 +31,7 @@
#include "xfs_sb.h"
#include "xfs_alloc.h"
#include "xfs_rmap.h"
+#include "xfs_refcount.h"
#include "scrub/xfs_scrub.h"
#include "scrub/scrub.h"
#include "scrub/common.h"
@@ -450,3 +451,69 @@ xfs_scrub_refcountbt(
return 0;
}
+
+/* xref check that a cow staging extent is marked in the refcountbt. */
+void
+xfs_scrub_xref_is_cow_staging(
+ struct xfs_scrub_context *sc,
+ xfs_agblock_t agbno,
+ xfs_extlen_t len)
+{
+ struct xfs_refcount_irec rc;
+ bool has_cowflag;
+ int has_refcount;
+ int error;
+
+ if (!sc->sa.refc_cur)
+ return;
+
+ /* Find the CoW staging extent. */
+ error = xfs_refcount_lookup_le(sc->sa.refc_cur,
+ agbno + XFS_REFC_COW_START, &has_refcount);
+ if (!xfs_scrub_should_check_xref(sc, &error, &sc->sa.refc_cur))
+ return;
+ if (!has_refcount) {
+ xfs_scrub_btree_xref_set_corrupt(sc, sc->sa.refc_cur, 0);
+ return;
+ }
+
+ error = xfs_refcount_get_rec(sc->sa.refc_cur, &rc, &has_refcount);
+ if (!xfs_scrub_should_check_xref(sc, &error, &sc->sa.refc_cur))
+ return;
+ if (!has_refcount) {
+ xfs_scrub_btree_xref_set_corrupt(sc, sc->sa.refc_cur, 0);
+ return;
+ }
+
+ /* CoW flag must be set, refcount must be 1. */
+ has_cowflag = (rc.rc_startblock & XFS_REFC_COW_START);
+ if (!has_cowflag || rc.rc_refcount != 1)
+ xfs_scrub_btree_xref_set_corrupt(sc, sc->sa.refc_cur, 0);
+
+ /* Must be at least as long as what was passed in */
+ if (rc.rc_blockcount < len)
+ xfs_scrub_btree_xref_set_corrupt(sc, sc->sa.refc_cur, 0);
+}
+
+/*
+ * xref check that the extent is not shared. Only file data blocks
+ * can have multiple owners.
+ */
+void
+xfs_scrub_xref_is_not_shared(
+ struct xfs_scrub_context *sc,
+ xfs_agblock_t agbno,
+ xfs_extlen_t len)
+{
+ bool shared;
+ int error;
+
+ if (!sc->sa.refc_cur)
+ return;
+
+ error = xfs_refcount_has_record(sc->sa.refc_cur, agbno, len, &shared);
+ if (!xfs_scrub_should_check_xref(sc, &error, &sc->sa.refc_cur))
+ return;
+ if (shared)
+ xfs_scrub_btree_xref_set_corrupt(sc, sc->sa.refc_cur, 0);
+}
@@ -32,6 +32,7 @@
#include "xfs_alloc.h"
#include "xfs_ialloc.h"
#include "xfs_rmap.h"
+#include "xfs_refcount.h"
#include "scrub/xfs_scrub.h"
#include "scrub/scrub.h"
#include "scrub/common.h"
@@ -51,6 +52,37 @@ xfs_scrub_setup_ag_rmapbt(
/* Reverse-mapping scrubber. */
+/* Cross-reference a rmap against the refcount btree. */
+STATIC void
+xfs_scrub_rmapbt_xref_refc(
+ struct xfs_scrub_context *sc,
+ struct xfs_rmap_irec *irec)
+{
+ xfs_agblock_t fbno;
+ xfs_extlen_t flen;
+ bool non_inode;
+ bool is_bmbt;
+ bool is_attr;
+ bool is_unwritten;
+ int error;
+
+ if (!sc->sa.refc_cur)
+ return;
+
+ 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;
+
+ /* If this is shared, must be a data fork extent. */
+ error = xfs_refcount_find_shared(sc->sa.refc_cur, irec->rm_startblock,
+ irec->rm_blockcount, &fbno, &flen, false);
+ if (!xfs_scrub_should_check_xref(sc, &error, &sc->sa.refc_cur))
+ return;
+ if (flen != 0 && (non_inode || is_attr || is_bmbt || is_unwritten))
+ xfs_scrub_btree_xref_set_corrupt(sc, sc->sa.refc_cur, 0);
+}
+
/* Cross-reference with the other btrees. */
STATIC void
xfs_scrub_rmapbt_xref(
@@ -68,6 +100,11 @@ xfs_scrub_rmapbt_xref(
xfs_scrub_xref_is_inode_chunk(sc, agbno, len);
else
xfs_scrub_xref_is_not_inode_chunk(sc, agbno, len);
+ if (irec->rm_owner == XFS_RMAP_OWN_COW)
+ xfs_scrub_xref_is_cow_staging(sc, irec->rm_startblock,
+ irec->rm_blockcount);
+ else
+ xfs_scrub_rmapbt_xref_refc(sc, irec);
}
/* Scrub an rmapbt record. */
@@ -138,5 +138,9 @@ void xfs_scrub_xref_is_not_owned_by(struct xfs_scrub_context *sc,
struct xfs_owner_info *oinfo);
void xfs_scrub_xref_has_no_owner(struct xfs_scrub_context *sc,
xfs_agblock_t agbno, xfs_extlen_t len);
+void xfs_scrub_xref_is_cow_staging(struct xfs_scrub_context *sc,
+ xfs_agblock_t bno, xfs_extlen_t len);
+void xfs_scrub_xref_is_not_shared(struct xfs_scrub_context *sc,
+ xfs_agblock_t bno, xfs_extlen_t len);
#endif /* __XFS_SCRUB_SCRUB_H__ */