1 files changed, 152 insertions, 0 deletions
diff --git a/fs/xfs/scrub/common.h b/fs/xfs/scrub/common.h
new file mode 100644
index 000000000..2ca80102e
--- /dev/null
+++ b/fs/xfs/scrub/common.h
@@ -0,0 +1,152 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2017 Oracle.  All Rights Reserved.
+ * Author: Darrick J. Wong <darrick.wong@oracle.com>
+ */
+#ifndef __XFS_SCRUB_COMMON_H__
+#define __XFS_SCRUB_COMMON_H__
+
+/*
+ * We /could/ terminate a scrub/repair operation early.  If we're not
+ * in a good place to continue (fatal signal, etc.) then bail out.
+ * Note that we're careful not to make any judgements about *error.
+ */
+static inline bool
+xchk_should_terminate(
+	struct xfs_scrub	*sc,
+	int			*error)
+{
+	/*
+	 * If preemption is disabled, we need to yield to the scheduler every
+	 * few seconds so that we don't run afoul of the soft lockup watchdog
+	 * or RCU stall detector.
+	 */
+	cond_resched();
+
+	if (fatal_signal_pending(current)) {
+		if (*error == 0)
+			*error = -EAGAIN;
+		return true;
+	}
+	return false;
+}
+
+int xchk_trans_alloc(struct xfs_scrub *sc, uint resblks);
+bool xchk_process_error(struct xfs_scrub *sc, xfs_agnumber_t agno,
+		xfs_agblock_t bno, int *error);
+bool xchk_fblock_process_error(struct xfs_scrub *sc, int whichfork,
+		xfs_fileoff_t offset, int *error);
+
+bool xchk_xref_process_error(struct xfs_scrub *sc,
+		xfs_agnumber_t agno, xfs_agblock_t bno, int *error);
+bool xchk_fblock_xref_process_error(struct xfs_scrub *sc,
+		int whichfork, xfs_fileoff_t offset, int *error);
+
+void xchk_block_set_preen(struct xfs_scrub *sc,
+		struct xfs_buf *bp);
+void xchk_ino_set_preen(struct xfs_scrub *sc, xfs_ino_t ino);
+
+void xchk_set_corrupt(struct xfs_scrub *sc);
+void xchk_block_set_corrupt(struct xfs_scrub *sc,
+		struct xfs_buf *bp);
+void xchk_ino_set_corrupt(struct xfs_scrub *sc, xfs_ino_t ino);
+void xchk_fblock_set_corrupt(struct xfs_scrub *sc, int whichfork,
+		xfs_fileoff_t offset);
+
+void xchk_block_xref_set_corrupt(struct xfs_scrub *sc,
+		struct xfs_buf *bp);
+void xchk_ino_xref_set_corrupt(struct xfs_scrub *sc,
+		xfs_ino_t ino);
+void xchk_fblock_xref_set_corrupt(struct xfs_scrub *sc,
+		int whichfork, xfs_fileoff_t offset);
+
+void xchk_ino_set_warning(struct xfs_scrub *sc, xfs_ino_t ino);
+void xchk_fblock_set_warning(struct xfs_scrub *sc, int whichfork,
+		xfs_fileoff_t offset);
+
+void xchk_set_incomplete(struct xfs_scrub *sc);
+int xchk_checkpoint_log(struct xfs_mount *mp);
+
+/* Are we set up for a cross-referencing check? */
+bool xchk_should_check_xref(struct xfs_scrub *sc, int *error,
+			   struct xfs_btree_cur **curpp);
+
+/* Setup functions */
+int xchk_setup_fs(struct xfs_scrub *sc);
+int xchk_setup_ag_allocbt(struct xfs_scrub *sc);
+int xchk_setup_ag_iallocbt(struct xfs_scrub *sc);
+int xchk_setup_ag_rmapbt(struct xfs_scrub *sc);
+int xchk_setup_ag_refcountbt(struct xfs_scrub *sc);
+int xchk_setup_inode(struct xfs_scrub *sc);
+int xchk_setup_inode_bmap(struct xfs_scrub *sc);
+int xchk_setup_inode_bmap_data(struct xfs_scrub *sc);
+int xchk_setup_directory(struct xfs_scrub *sc);
+int xchk_setup_xattr(struct xfs_scrub *sc);
+int xchk_setup_symlink(struct xfs_scrub *sc);
+int xchk_setup_parent(struct xfs_scrub *sc);
+#ifdef CONFIG_XFS_RT
+int xchk_setup_rt(struct xfs_scrub *sc);
+#else
+static inline int
+xchk_setup_rt(struct xfs_scrub *sc)
+{
+	return -ENOENT;
+}
+#endif
+#ifdef CONFIG_XFS_QUOTA
+int xchk_setup_quota(struct xfs_scrub *sc);
+#else
+static inline int
+xchk_setup_quota(struct xfs_scrub *sc)
+{
+	return -ENOENT;
+}
+#endif
+int xchk_setup_fscounters(struct xfs_scrub *sc);
+
+void xchk_ag_free(struct xfs_scrub *sc, struct xchk_ag *sa);
+int xchk_ag_init(struct xfs_scrub *sc, xfs_agnumber_t agno,
+		struct xchk_ag *sa);
+
+/*
+ * Grab all AG resources, treating the inability to grab the perag structure as
+ * a fs corruption.  This is intended for callers checking an ondisk reference
+ * to a given AG, which means that the AG must still exist.
+ */
+static inline int
+xchk_ag_init_existing(
+	struct xfs_scrub	*sc,
+	xfs_agnumber_t		agno,
+	struct xchk_ag		*sa)
+{
+	int			error = xchk_ag_init(sc, agno, sa);
+
+	return error == -ENOENT ? -EFSCORRUPTED : error;
+}
+
+int xchk_ag_read_headers(struct xfs_scrub *sc, xfs_agnumber_t agno,
+		struct xchk_ag *sa);
+void xchk_ag_btcur_free(struct xchk_ag *sa);
+void xchk_ag_btcur_init(struct xfs_scrub *sc, struct xchk_ag *sa);
+int xchk_count_rmap_ownedby_ag(struct xfs_scrub *sc, struct xfs_btree_cur *cur,
+		const struct xfs_owner_info *oinfo, xfs_filblks_t *blocks);
+
+int xchk_setup_ag_btree(struct xfs_scrub *sc, bool force_log);
+int xchk_get_inode(struct xfs_scrub *sc);
+int xchk_setup_inode_contents(struct xfs_scrub *sc, unsigned int resblks);
+void xchk_buffer_recheck(struct xfs_scrub *sc, struct xfs_buf *bp);
+
+/*
+ * Don't bother cross-referencing if we already found corruption or cross
+ * referencing discrepancies.
+ */
+static inline bool xchk_skip_xref(struct xfs_scrub_metadata *sm)
+{
+	return sm->sm_flags & (XFS_SCRUB_OFLAG_CORRUPT |
+			       XFS_SCRUB_OFLAG_XCORRUPT);
+}
+
+int xchk_metadata_inode_forks(struct xfs_scrub *sc);
+int xchk_ilock_inverted(struct xfs_inode *ip, uint lock_mode);
+
+#endif	/* __XFS_SCRUB_COMMON_H__ */