bcachefs: Options for recovery_passes, recovery_passes_exclude

This adds mount options for specifying recovery passes to run, or
exclude; the immediate need for this is that backpointers fsck is having
trouble completing, so we need a way to skip it.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

fs/bcachefs/bcachefs.h

@@ -1045,8 +1045,6 @@ struct bch_fs {
 	 * for signaling to the toplevel code which pass we want to run now.
 	 */
 	enum bch_recovery_pass	curr_recovery_pass;
-	/* bitmap of explicitly enabled recovery passes: */
-	u64			recovery_passes_explicit;
 	/* bitmask of recovery passes that we actually ran */
 	u64			recovery_passes_complete;
 	/* never rewinds version of curr_recovery_pass */

fs/bcachefs/btree_io.c

@@ -1666,7 +1666,7 @@ void bch2_btree_node_read(struct btree_trans *trans, struct btree *b,
 		bch2_btree_pos_to_text(&buf, c, b);
 		bch_err_ratelimited(c, "%s", buf.buf);
 
-		if (c->recovery_passes_explicit & BIT_ULL(BCH_RECOVERY_PASS_check_topology) &&
+		if (c->opts.recovery_passes & BIT_ULL(BCH_RECOVERY_PASS_check_topology) &&
 		    c->curr_recovery_pass > BCH_RECOVERY_PASS_check_topology)
 			bch2_fatal_error(c);
 

fs/bcachefs/btree_update_interior.c

@@ -146,7 +146,7 @@ int bch2_btree_node_check_topology(struct btree_trans *trans, struct btree *b)
 	printbuf_exit(&buf);
 	return ret;
 topology_repair:
-	if ((c->recovery_passes_explicit & BIT_ULL(BCH_RECOVERY_PASS_check_topology)) &&
+	if ((c->opts.recovery_passes & BIT_ULL(BCH_RECOVERY_PASS_check_topology)) &&
 	    c->curr_recovery_pass > BCH_RECOVERY_PASS_check_topology) {
 		bch2_inconsistent_error(c);
 		ret = -BCH_ERR_btree_need_topology_repair;

fs/bcachefs/opts.c

@@ -432,6 +432,9 @@ void bch2_opt_to_text(struct printbuf *out,
 		else
 			prt_str(out, opt->choices[v]);
 		break;
+	case BCH_OPT_BITFIELD:
+		prt_bitflags(out, opt->choices, v);
+		break;
 	case BCH_OPT_FN:
 		opt->fn.to_text(out, c, sb, v);
 		break;

fs/bcachefs/opts.h

@@ -373,6 +373,16 @@ enum fsck_err_opts {
 	  OPT_BOOL(),							\
 	  BCH2_NO_SB_OPT,		false,				\
 	  NULL,		"Exit recovery immediately prior to journal replay")\
+	x(recovery_passes,		u64,				\
+	  OPT_FS|OPT_MOUNT,						\
+	  OPT_BITFIELD(bch2_recovery_passes),				\
+	  BCH2_NO_SB_OPT,		0,				\
+	  NULL,		"Recovery passes to run explicitly")		\
+	x(recovery_passes_exclude,	u64,				\
+	  OPT_FS|OPT_MOUNT,						\
+	  OPT_BITFIELD(bch2_recovery_passes),				\
+	  BCH2_NO_SB_OPT,		0,				\
+	  NULL,		"Recovery passes to exclude")			\
 	x(recovery_pass_last,		u8,				\
 	  OPT_FS|OPT_MOUNT,						\
 	  OPT_STR_NOLIMIT(bch2_recovery_passes),			\

fs/bcachefs/recovery.c

@@ -97,7 +97,7 @@ static void bch2_reconstruct_alloc(struct bch_fs *c)
 	bch2_write_super(c);
 	mutex_unlock(&c->sb_lock);
 
-	c->recovery_passes_explicit |= bch2_recovery_passes_from_stable(le64_to_cpu(ext->recovery_passes_required[0]));
+	c->opts.recovery_passes |= bch2_recovery_passes_from_stable(le64_to_cpu(ext->recovery_passes_required[0]));
 
 
 	bch2_shoot_down_journal_keys(c, BTREE_ID_alloc,
@@ -525,17 +525,17 @@ static int read_btree_roots(struct bch_fs *c)
 					"error reading btree root %s l=%u: %s",
 					bch2_btree_id_str(i), r->level, bch2_err_str(ret))) {
 			if (btree_id_is_alloc(i)) {
-				c->recovery_passes_explicit |= BIT_ULL(BCH_RECOVERY_PASS_check_allocations);
-				c->recovery_passes_explicit |= BIT_ULL(BCH_RECOVERY_PASS_check_alloc_info);
-				c->recovery_passes_explicit |= BIT_ULL(BCH_RECOVERY_PASS_check_lrus);
-				c->recovery_passes_explicit |= BIT_ULL(BCH_RECOVERY_PASS_check_extents_to_backpointers);
-				c->recovery_passes_explicit |= BIT_ULL(BCH_RECOVERY_PASS_check_alloc_to_lru_refs);
+				c->opts.recovery_passes |= BIT_ULL(BCH_RECOVERY_PASS_check_allocations);
+				c->opts.recovery_passes |= BIT_ULL(BCH_RECOVERY_PASS_check_alloc_info);
+				c->opts.recovery_passes |= BIT_ULL(BCH_RECOVERY_PASS_check_lrus);
+				c->opts.recovery_passes |= BIT_ULL(BCH_RECOVERY_PASS_check_extents_to_backpointers);
+				c->opts.recovery_passes |= BIT_ULL(BCH_RECOVERY_PASS_check_alloc_to_lru_refs);
 				c->sb.compat &= ~(1ULL << BCH_COMPAT_alloc_info);
 				r->error = 0;
-			} else if (!(c->recovery_passes_explicit & BIT_ULL(BCH_RECOVERY_PASS_scan_for_btree_nodes))) {
+			} else if (!(c->opts.recovery_passes & BIT_ULL(BCH_RECOVERY_PASS_scan_for_btree_nodes))) {
 				bch_info(c, "will run btree node scan");
-				c->recovery_passes_explicit |= BIT_ULL(BCH_RECOVERY_PASS_scan_for_btree_nodes);
-				c->recovery_passes_explicit |= BIT_ULL(BCH_RECOVERY_PASS_check_topology);
+				c->opts.recovery_passes |= BIT_ULL(BCH_RECOVERY_PASS_scan_for_btree_nodes);
+				c->opts.recovery_passes |= BIT_ULL(BCH_RECOVERY_PASS_check_topology);
 			}
 
 			ret = 0;
@@ -706,14 +706,14 @@ int bch2_fs_recovery(struct bch_fs *c)
 	if (check_version_upgrade(c))
 		write_sb = true;
 
-	c->recovery_passes_explicit |= bch2_recovery_passes_from_stable(le64_to_cpu(ext->recovery_passes_required[0]));
+	c->opts.recovery_passes |= bch2_recovery_passes_from_stable(le64_to_cpu(ext->recovery_passes_required[0]));
 
 	if (write_sb)
 		bch2_write_super(c);
 	mutex_unlock(&c->sb_lock);
 
 	if (c->opts.fsck && IS_ENABLED(CONFIG_BCACHEFS_DEBUG))
-		c->recovery_passes_explicit |= BIT_ULL(BCH_RECOVERY_PASS_check_topology);
+		c->opts.recovery_passes |= BIT_ULL(BCH_RECOVERY_PASS_check_topology);
 
 	if (c->opts.fsck)
 		set_bit(BCH_FS_fsck_running, &c->flags);

fs/bcachefs/recovery_passes.c

@@ -40,7 +40,7 @@ static int bch2_set_may_go_rw(struct bch_fs *c)
 
 	set_bit(BCH_FS_may_go_rw, &c->flags);
 
-	if (keys->nr || c->opts.fsck || !c->sb.clean || c->recovery_passes_explicit)
+	if (keys->nr || c->opts.fsck || !c->sb.clean || c->opts.recovery_passes)
 		return bch2_fs_read_write_early(c);
 	return 0;
 }
@@ -97,14 +97,14 @@ u64 bch2_recovery_passes_from_stable(u64 v)
 int bch2_run_explicit_recovery_pass(struct bch_fs *c,
 				    enum bch_recovery_pass pass)
 {
-	if (c->recovery_passes_explicit & BIT_ULL(pass))
+	if (c->opts.recovery_passes & BIT_ULL(pass))
 		return 0;
 
 	bch_info(c, "running explicit recovery pass %s (%u), currently at %s (%u)",
 		 bch2_recovery_passes[pass], pass,
 		 bch2_recovery_passes[c->curr_recovery_pass], c->curr_recovery_pass);
 
-	c->recovery_passes_explicit |= BIT_ULL(pass);
+	c->opts.recovery_passes |= BIT_ULL(pass);
 
 	if (c->curr_recovery_pass >= pass) {
 		c->curr_recovery_pass = pass;
@@ -161,7 +161,9 @@ static bool should_run_recovery_pass(struct bch_fs *c, enum bch_recovery_pass pa
 {
 	struct recovery_pass_fn *p = recovery_pass_fns + pass;
 
-	if (c->recovery_passes_explicit & BIT_ULL(pass))
+	if (c->opts.recovery_passes_exclude & BIT_ULL(pass))
+		return false;
+	if (c->opts.recovery_passes & BIT_ULL(pass))
 		return true;
 	if ((p->when & PASS_FSCK) && c->opts.fsck)
 		return true;

fs/bcachefs/util.c

@@ -214,7 +214,7 @@ u64 bch2_read_flag_list(const char *opt, const char * const list[])
 
 	s = strim(d);
 
-	while ((p = strsep(&s, ","))) {
+	while ((p = strsep(&s, ",;"))) {
 		int flag = match_string(list, -1, p);
 
 		if (flag < 0) {