1 files changed, 70 insertions, 3 deletions

diff --git a/libbcachefs/ec.c b/libbcachefs/ec.c
index d2a5e76e..1090cdb7 100644
--- a/libbcachefs/ec.c
+++ b/libbcachefs/ec.c
@@ -20,6 +20,7 @@
 #include "io_read.h"
 #include "io_write.h"
 #include "keylist.h"
+#include "lru.h"
 #include "recovery.h"
 #include "replicas.h"
 #include "super-io.h"
@@ -298,10 +299,22 @@ static int mark_stripe_bucket(struct btree_trans *trans,
 	struct bpos bucket = PTR_BUCKET_POS(ca, ptr);
 
 	if (flags & BTREE_TRIGGER_transactional) {
+		struct extent_ptr_decoded p = {
+			.ptr = *ptr,
+			.crc = bch2_extent_crc_unpack(s.k, NULL),
+		};
+		struct bkey_i_backpointer bp;
+		bch2_extent_ptr_to_bp(c, BTREE_ID_stripes, 0, s.s_c, p,
+				      (const union bch_extent_entry *) ptr, &bp);
+
 		struct bkey_i_alloc_v4 *a =
 			bch2_trans_start_alloc_update(trans, bucket, 0);
-		ret = PTR_ERR_OR_ZERO(a) ?:
-			__mark_stripe_bucket(trans, ca, s, ptr_idx, deleting, bucket, &a->v, flags);
+		ret   = PTR_ERR_OR_ZERO(a) ?:
+			__mark_stripe_bucket(trans, ca, s, ptr_idx, deleting, bucket, &a->v, flags) ?:
+			bch2_bucket_backpointer_mod(trans, s.s_c, &bp,
+						    !(flags & BTREE_TRIGGER_overwrite));
+		if (ret)
+			goto err;
 	}
 
 	if (flags & BTREE_TRIGGER_gc) {
@@ -399,6 +412,15 @@ int bch2_trigger_stripe(struct btree_trans *trans,
 	       (new_s->nr_blocks	!= old_s->nr_blocks ||
 		new_s->nr_redundant	!= old_s->nr_redundant));
 
+	if (flags & BTREE_TRIGGER_transactional) {
+		int ret = bch2_lru_change(trans,
+					  BCH_LRU_STRIPE_FRAGMENTATION,
+					  idx,
+					  stripe_lru_pos(old_s),
+					  stripe_lru_pos(new_s));
+		if (ret)
+			return ret;
+	}
 
 	if (flags & (BTREE_TRIGGER_transactional|BTREE_TRIGGER_gc)) {
 		/*
@@ -1163,6 +1185,10 @@ err:
 	return ret;
 }
 
+/*
+ * XXX
+ * can we kill this and delete stripes from the trigger?
+ */
 static void ec_stripe_delete_work(struct work_struct *work)
 {
 	struct bch_fs *c =
@@ -1380,8 +1406,12 @@ static int ec_stripe_update_bucket(struct btree_trans *trans, struct ec_stripe_b
 		if (bp_k.k->type != KEY_TYPE_backpointer)
 			continue;
 
+		struct bkey_s_c_backpointer bp = bkey_s_c_to_backpointer(bp_k);
+		if (bp.v->btree_id == BTREE_ID_stripes)
+			continue;
+
 		ec_stripe_update_extent(trans, ca, bucket_pos, ptr.gen, s,
-					bkey_s_c_to_backpointer(bp_k), &last_flushed);
+					bp, &last_flushed);
 	}));
 
 	bch2_bkey_buf_exit(&last_flushed, c);
@@ -2503,3 +2533,40 @@ int bch2_fs_ec_init(struct bch_fs *c)
 	return bioset_init(&c->ec_bioset, 1, offsetof(struct ec_bio, bio),
 			   BIOSET_NEED_BVECS);
 }
+
+static int bch2_check_stripe_to_lru_ref(struct btree_trans *trans,
+					struct bkey_s_c k,
+					struct bkey_buf *last_flushed)
+{
+	if (k.k->type != KEY_TYPE_stripe)
+		return 0;
+
+	struct bkey_s_c_stripe s = bkey_s_c_to_stripe(k);
+
+	u64 lru_idx = stripe_lru_pos(s.v);
+	if (lru_idx) {
+		int ret = bch2_lru_check_set(trans, BCH_LRU_STRIPE_FRAGMENTATION,
+					     k.k->p.offset, lru_idx, k, last_flushed);
+		if (ret)
+			return ret;
+	}
+	return 0;
+}
+
+int bch2_check_stripe_to_lru_refs(struct bch_fs *c)
+{
+	struct bkey_buf last_flushed;
+
+	bch2_bkey_buf_init(&last_flushed);
+	bkey_init(&last_flushed.k->k);
+
+	int ret = bch2_trans_run(c,
+		for_each_btree_key_commit(trans, iter, BTREE_ID_stripes,
+				POS_MIN, BTREE_ITER_prefetch, k,
+				NULL, NULL, BCH_TRANS_COMMIT_no_enospc,
+			bch2_check_stripe_to_lru_ref(trans, k, &last_flushed)));
+
+	bch2_bkey_buf_exit(&last_flushed, c);
+	bch_err_fn(c, ret);
+	return ret;
+}