bcachefs: Ensure topology repair runs

This fixes should_restart_for_topology_repair() - previously it was
returning false if the btree io path had already seleceted topology
repair to run, even if it hadn't run yet.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

fs/bcachefs/bcachefs.h

@@ -995,6 +995,7 @@ struct bch_fs {
 	enum bch_recovery_pass	curr_recovery_pass;
 	/* bitmap of explicitly enabled recovery passes: */
 	u64			recovery_passes_explicit;
+	u64			recovery_passes_complete;
 
 	/* DEBUG JUNK */
 	struct dentry		*fs_debug_dir;

fs/bcachefs/btree_gc.c

@@ -43,7 +43,7 @@
 static bool should_restart_for_topology_repair(struct bch_fs *c)
 {
 	return c->opts.fix_errors != FSCK_FIX_no &&
-		!(c->recovery_passes_explicit & BIT_ULL(BCH_RECOVERY_PASS_check_topology));
+		!(c->recovery_passes_complete & BIT_ULL(BCH_RECOVERY_PASS_check_topology));
 }
 
 static inline void __gc_pos_set(struct bch_fs *c, struct gc_pos new_pos)

fs/bcachefs/recovery.c

@@ -1266,6 +1266,8 @@ static int bch2_run_recovery_pass(struct bch_fs *c, enum bch_recovery_pass pass)
 			return ret;
 		if (!(p->when & PASS_SILENT))
 			printk(KERN_CONT " done\n");
+
+		c->recovery_passes_complete |= BIT_ULL(pass);
 	}
 
 	return 0;

fs/bcachefs/recovery.h

@@ -68,6 +68,7 @@ static inline int bch2_run_explicit_recovery_pass(struct bch_fs *c,
 
 	if (c->curr_recovery_pass >= pass) {
 		c->curr_recovery_pass = pass;
+		c->recovery_passes_complete &= (1ULL << pass) >> 1;
 		return -BCH_ERR_restart_recovery;
 	} else {
 		return 0;