Update bcachefs sources to 14f68409be bcachefs: Optimize fiemap

13 files changed, 152 insertions, 117 deletions

diff --git a/.bcachefs_revision b/.bcachefs_revision
index fd1cda2a..85472818 100644
--- a/.bcachefs_revision
+++ b/.bcachefs_revision
@@ -1 +1 @@
-ece184f718c2b678738bc2c42906e90eeb8ba7dc
+14f68409bec43faff9d7480632488def385e0638
diff --git a/include/linux/percpu-rwsem.h b/include/linux/percpu-rwsem.h
index f286f304..153251c0 100644
--- a/include/linux/percpu-rwsem.h
+++ b/include/linux/percpu-rwsem.h
@@ -20,6 +20,11 @@ static inline void percpu_down_read(struct percpu_rw_semaphore *sem)
 	pthread_mutex_lock(&sem->lock);
 }
 
+static inline int percpu_down_read_trylock(struct percpu_rw_semaphore *sem)
+{
+	return !pthread_mutex_trylock(&sem->lock);
+}
+
 static inline void percpu_up_read_preempt_enable(struct percpu_rw_semaphore *sem)
 {
 	pthread_mutex_unlock(&sem->lock);
diff --git a/libbcachefs/bcachefs.h b/libbcachefs/bcachefs.h
index 1e601e7b..c85d7766 100644
--- a/libbcachefs/bcachefs.h
+++ b/libbcachefs/bcachefs.h
@@ -741,6 +741,7 @@ struct bch_fs {
 	/* ERASURE CODING */
 	struct list_head	ec_new_stripe_list;
 	struct mutex		ec_new_stripe_lock;
+	u64			ec_stripe_hint;
 
 	struct bio_set		ec_bioset;
 
diff --git a/libbcachefs/bkey_sort.c b/libbcachefs/bkey_sort.c
index 9f5d9b4b..e32fad5a 100644
--- a/libbcachefs/bkey_sort.c
+++ b/libbcachefs/bkey_sort.c
@@ -415,25 +415,22 @@ bch2_sort_repack_merge(struct bch_fs *c,
 		       struct bkey_format *out_f,
 		       bool filter_whiteouts)
 {
-	struct bkey_packed *prev = NULL, *k_packed, *next;
-	struct bkey k_unpacked;
+	struct bkey_packed *prev = NULL, *k_packed;
 	struct bkey_s k;
 	struct btree_nr_keys nr;
+	BKEY_PADDED(k) tmp;
 
 	memset(&nr, 0, sizeof(nr));
 
-	next = bch2_btree_node_iter_next_all(iter, src);
-	while ((k_packed = next)) {
-		/*
-		 * The filter might modify the size of @k's value, so advance
-		 * the iterator first:
-		 */
-		next = bch2_btree_node_iter_next_all(iter, src);
-
+	while ((k_packed = bch2_btree_node_iter_next_all(iter, src))) {
 		if (filter_whiteouts && bkey_whiteout(k_packed))
 			continue;
 
-		k = __bkey_disassemble(src, k_packed, &k_unpacked);
+		EBUG_ON(bkeyp_val_u64s(&src->format, k_packed) >
+			BKEY_EXTENT_VAL_U64s_MAX);
+
+		bch2_bkey_unpack(src, &tmp.k, k_packed);
+		k = bkey_i_to_s(&tmp.k);
 
 		if (filter_whiteouts &&
 		    bch2_bkey_normalize(c, k))
diff --git a/libbcachefs/btree_update_leaf.c b/libbcachefs/btree_update_leaf.c
index 906e4999..c0a84153 100644
--- a/libbcachefs/btree_update_leaf.c
+++ b/libbcachefs/btree_update_leaf.c
@@ -575,6 +575,10 @@ static inline int do_btree_insert_at(struct btree_trans *trans,
 		}
 	} while (saw_non_marked);
 
+	trans_for_each_update(trans, i)
+		btree_insert_entry_checks(trans, i);
+	bch2_btree_trans_verify_locks(trans);
+
 	btree_trans_lock_write(c, trans);
 
 	if (race_fault()) {
@@ -853,7 +857,7 @@ int bch2_trans_commit(struct btree_trans *trans,
 		      unsigned flags)
 {
 	struct bch_fs *c = trans->c;
-	struct btree_insert_entry *i;
+	struct btree_insert_entry *i = NULL;
 	unsigned orig_mem_top = trans->mem_top;
 	int ret = 0;
 
@@ -875,10 +879,6 @@ int bch2_trans_commit(struct btree_trans *trans,
 	trans->journal_seq	= journal_seq;
 	trans->flags		= flags;
 
-	trans_for_each_update(trans, i)
-		btree_insert_entry_checks(trans, i);
-	bch2_btree_trans_verify_locks(trans);
-
 	if (unlikely(!(trans->flags & BTREE_INSERT_NOCHECK_RW) &&
 		     !percpu_ref_tryget(&c->writes))) {
 		if (likely(!(trans->flags & BTREE_INSERT_LAZY_RW)))
diff --git a/libbcachefs/buckets.c b/libbcachefs/buckets.c
index d6dcbf91..2bcf929a 100644
--- a/libbcachefs/buckets.c
+++ b/libbcachefs/buckets.c
@@ -1483,8 +1483,6 @@ static int bch2_trans_mark_stripe_ptr(struct btree_trans *trans,
 	s64 parity_sectors;
 	int ret = 0;
 
-	BUG_ON(!sectors);
-
 	ret = trans_get_key(trans, BTREE_ID_EC, POS(0, p.idx), &iter, &k);
 	if (ret)
 		return ret;
@@ -1549,6 +1547,12 @@ static int bch2_trans_mark_extent(struct btree_trans *trans,
 			? sectors
 			: ptr_disk_sectors_delta(p, offset, sectors, flags);
 
+		/*
+		 * can happen due to rounding with compressed extents:
+		 */
+		if (!disk_sectors)
+			continue;
+
 		ret = bch2_trans_mark_pointer(trans, p, disk_sectors,
 					      data_type);
 		if (ret < 0)
diff --git a/libbcachefs/ec.c b/libbcachefs/ec.c
index bdb18c2a..0742d2c1 100644
--- a/libbcachefs/ec.c
+++ b/libbcachefs/ec.c
@@ -704,26 +704,34 @@ static int ec_stripe_bkey_insert(struct bch_fs *c,
 	struct btree_trans trans;
 	struct btree_iter *iter;
 	struct bkey_s_c k;
+	struct bpos start_pos = POS(0, c->ec_stripe_hint);
 	int ret;
 
 	bch2_trans_init(&trans, c, 0, 0);
 retry:
 	bch2_trans_begin(&trans);
 
-	/* XXX: start pos hint */
-	for_each_btree_key(&trans, iter, BTREE_ID_EC, POS_MIN,
+	for_each_btree_key(&trans, iter, BTREE_ID_EC, start_pos,
 			   BTREE_ITER_SLOTS|BTREE_ITER_INTENT, k, ret) {
-		if (bkey_cmp(k.k->p, POS(0, U32_MAX)) > 0)
+		if (bkey_cmp(k.k->p, POS(0, U32_MAX)) > 0) {
+			if (start_pos.offset) {
+				start_pos = POS_MIN;
+				bch2_btree_iter_set_pos(iter, start_pos);
+				continue;
+			}
+
+			ret = -ENOSPC;
 			break;
+		}
 
 		if (bkey_deleted(k.k))
 			goto found_slot;
 	}
 
-	if (!ret)
-		ret = -ENOSPC;
 	goto err;
 found_slot:
+	start_pos = iter->pos;
+
 	ret = ec_stripe_mem_alloc(c, iter);
 	if (ret)
 		goto err;
@@ -738,6 +746,8 @@ found_slot:
 err:
 	if (ret == -EINTR)
 		goto retry;
+
+	c->ec_stripe_hint = ret ? start_pos.offset : start_pos.offset + 1;
 	bch2_trans_exit(&trans);
 
 	return ret;
diff --git a/libbcachefs/extents.c b/libbcachefs/extents.c
index 5c6bae55..ecebd791 100644
--- a/libbcachefs/extents.c
+++ b/libbcachefs/extents.c
@@ -46,7 +46,8 @@ unsigned bch2_bkey_nr_dirty_ptrs(struct bkey_s_c k)
 
 	switch (k.k->type) {
 	case KEY_TYPE_btree_ptr:
-	case KEY_TYPE_extent: {
+	case KEY_TYPE_extent:
+	case KEY_TYPE_reflink_v: {
 		struct bkey_ptrs_c p = bch2_bkey_ptrs_c(k);
 		const struct bch_extent_ptr *ptr;
 
@@ -309,20 +310,15 @@ bch2_extent_has_group(struct bch_fs *c, struct bkey_s_c_extent e, unsigned group
 
 unsigned bch2_extent_is_compressed(struct bkey_s_c k)
 {
+	struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(k);
+	const union bch_extent_entry *entry;
+	struct extent_ptr_decoded p;
 	unsigned ret = 0;
 
-	switch (k.k->type) {
-	case KEY_TYPE_extent: {
-		struct bkey_s_c_extent e = bkey_s_c_to_extent(k);
-		const union bch_extent_entry *entry;
-		struct extent_ptr_decoded p;
-
-		extent_for_each_ptr_decode(e, p, entry)
-			if (!p.ptr.cached &&
-			    p.crc.compression_type != BCH_COMPRESSION_NONE)
-				ret += p.crc.compressed_size;
-	}
-	}
+	bkey_for_each_ptr_decode(k.k, ptrs, p, entry)
+		if (!p.ptr.cached &&
+		    p.crc.compression_type != BCH_COMPRESSION_NONE)
+			ret += p.crc.compressed_size;
 
 	return ret;
 }
@@ -455,6 +451,8 @@ found:
 	BUG_ON(n.live_size != k->k.size);
 
 restart_narrow_pointers:
+	ptrs = bch2_bkey_ptrs(bkey_i_to_s(k));
+
 	bkey_for_each_ptr_decode(&k->k, ptrs, p, i)
 		if (can_narrow_crc(p.crc, n)) {
 			bch2_bkey_drop_ptr(bkey_i_to_s(k), &i->ptr);
@@ -809,19 +807,6 @@ bool bch2_cut_back(struct bpos where, struct bkey *k)
 	return true;
 }
 
-/**
- * bch_key_resize - adjust size of @k
- *
- * bkey_start_offset(k) will be preserved, modifies where the extent ends
- */
-void bch2_key_resize(struct bkey *k,
-		    unsigned new_size)
-{
-	k->p.offset -= k->size;
-	k->p.offset += new_size;
-	k->size = new_size;
-}
-
 static bool extent_i_save(struct btree *b, struct bkey_packed *dst,
 			  struct bkey_i *src)
 {
@@ -968,6 +953,7 @@ static int __bch2_extent_atomic_end(struct btree_trans *trans,
 
 	switch (k.k->type) {
 	case KEY_TYPE_extent:
+	case KEY_TYPE_reflink_v:
 		*nr_iters += bch2_bkey_nr_alloc_ptrs(k);
 
 		if (*nr_iters >= max_iters) {
@@ -1372,12 +1358,11 @@ void bch2_insert_fixup_extent(struct btree_trans *trans,
 
 		if (s.deleting)
 			tmp.k.k.type = KEY_TYPE_discard;
-#if 0
-		/* disabled due to lock recursion - mark_lock: */
+
 		if (debug_check_bkeys(c))
 			bch2_bkey_debugcheck(c, iter->l[0].b,
 					     bkey_i_to_s_c(&tmp.k));
-#endif
+
 		EBUG_ON(bkey_deleted(&tmp.k.k) || !tmp.k.k.size);
 
 		extent_bset_insert(c, iter, &tmp.k);
@@ -1419,11 +1404,13 @@ void bch2_extent_debugcheck(struct bch_fs *c, struct btree *b,
 	 * going to get overwritten during replay)
 	 */
 
-	bch2_fs_bug_on(!test_bit(BCH_FS_REBUILD_REPLICAS, &c->flags) &&
-		       !bch2_bkey_replicas_marked(c, e.s_c, false), c,
-		       "extent key bad (replicas not marked in superblock):\n%s",
-		       (bch2_bkey_val_to_text(&PBUF(buf), c, e.s_c), buf));
-
+	if (percpu_down_read_trylock(&c->mark_lock)) {
+		bch2_fs_bug_on(!test_bit(BCH_FS_REBUILD_REPLICAS, &c->flags) &&
+			       !bch2_bkey_replicas_marked_locked(c, e.s_c, false), c,
+			       "extent key bad (replicas not marked in superblock):\n%s",
+			       (bch2_bkey_val_to_text(&PBUF(buf), c, e.s_c), buf));
+		percpu_up_read(&c->mark_lock);
+	}
 	/*
 	 * If journal replay hasn't finished, we might be seeing keys
 	 * that will be overwritten by the time journal replay is done:
@@ -1591,9 +1578,9 @@ bool bch2_extent_normalize(struct bch_fs *c, struct bkey_s k)
 
 	/* will only happen if all pointers were cached: */
 	if (!bkey_val_u64s(k.k))
-		k.k->type = KEY_TYPE_deleted;
+		k.k->type = KEY_TYPE_discard;
 
-	return false;
+	return bkey_whiteout(k.k);
 }
 
 void bch2_bkey_mark_replicas_cached(struct bch_fs *c, struct bkey_s k,
diff --git a/libbcachefs/extents.h b/libbcachefs/extents.h
index 6fddbace..189ae4c7 100644
--- a/libbcachefs/extents.h
+++ b/libbcachefs/extents.h
@@ -538,7 +538,18 @@ static inline void bch2_cut_front(struct bpos where, struct bkey_i *k)
 }
 
 bool bch2_cut_back(struct bpos, struct bkey *);
-void bch2_key_resize(struct bkey *, unsigned);
+
+/**
+ * bch_key_resize - adjust size of @k
+ *
+ * bkey_start_offset(k) will be preserved, modifies where the extent ends
+ */
+static inline void bch2_key_resize(struct bkey *k, unsigned new_size)
+{
+	k->p.offset -= k->size;
+	k->p.offset += new_size;
+	k->size = new_size;
+}
 
 /*
  * In extent_sort_fix_overlapping(), insert_fixup_extent(),
diff --git a/libbcachefs/fs-io.c b/libbcachefs/fs-io.c
index d8113b29..d635ebb5 100644
--- a/libbcachefs/fs-io.c
+++ b/libbcachefs/fs-io.c
@@ -676,8 +676,8 @@ static int bch2_page_reservation_get(struct bch_fs *c,
 	if (!s)
 		return -ENOMEM;
 
-	for (i = offset / 512;
-	     i < DIV_ROUND_UP(offset + len, 512);
+	for (i = round_down(offset, block_bytes(c)) >> 9;
+	     i < round_up(offset + len, block_bytes(c)) >> 9;
 	     i++) {
 		disk_sectors += sectors_to_reserve(&s->s[i],
 						res->disk.nr_replicas);
@@ -749,8 +749,8 @@ static void bch2_set_page_dirty(struct bch_fs *c,
 	struct bch_page_state *s = bch2_page_state(page);
 	unsigned i, dirty_sectors = 0;
 
-	for (i = offset / 512;
-	     i < DIV_ROUND_UP(offset + len, 512);
+	for (i = round_down(offset, block_bytes(c)) >> 9;
+	     i < round_up(offset + len, block_bytes(c)) >> 9;
 	     i++) {
 		unsigned sectors = sectors_to_reserve(&s->s[i],
 						res->disk.nr_replicas);
@@ -1086,7 +1086,7 @@ retry:
 			bkey_start_offset(k.k);
 		sectors = k.k->size - offset_into_extent;
 
-		ret = bch2_read_indirect_extent(trans, iter,
+		ret = bch2_read_indirect_extent(trans,
 					&offset_into_extent, &tmp.k);
 		if (ret)
 			break;
diff --git a/libbcachefs/fs.c b/libbcachefs/fs.c
index a35f34eb..f9ee4ac2 100644
--- a/libbcachefs/fs.c
+++ b/libbcachefs/fs.c
@@ -1124,6 +1124,7 @@ static int bch2_fiemap(struct inode *vinode, struct fiemap_extent_info *info,
 	struct btree_iter *iter;
 	struct bkey_s_c k;
 	BKEY_PADDED(k) cur, prev;
+	struct bpos end = POS(ei->v.i_ino, (start + len) >> 9);
 	unsigned offset_into_extent, sectors;
 	bool have_extent = false;
 	int ret = 0;
@@ -1134,14 +1135,16 @@ static int bch2_fiemap(struct inode *vinode, struct fiemap_extent_info *info,
 	bch2_trans_init(&trans, c, 0, 0);
 
 	iter = bch2_trans_get_iter(&trans, BTREE_ID_EXTENTS,
-				   POS(ei->v.i_ino, start >> 9),
-				   BTREE_ITER_SLOTS);
-
-	while (bkey_cmp(iter->pos, POS(ei->v.i_ino, (start + len) >> 9)) < 0) {
-		k = bch2_btree_iter_peek_slot(iter);
-		ret = bkey_err(k);
-		if (ret)
-			goto err;
+				   POS(ei->v.i_ino, start >> 9), 0);
+retry:
+	while ((k = bch2_btree_iter_peek(iter)).k &&
+	       !(ret = bkey_err(k)) &&
+	       bkey_cmp(iter->pos, end) < 0) {
+		if (!bkey_extent_is_data(k.k) &&
+		    k.k->type != KEY_TYPE_reservation) {
+			bch2_btree_iter_next(iter);
+			continue;
+		}
 
 		bkey_reassemble(&cur.k, k);
 		k = bkey_i_to_s_c(&cur.k);
@@ -1150,41 +1153,44 @@ static int bch2_fiemap(struct inode *vinode, struct fiemap_extent_info *info,
 			bkey_start_offset(k.k);
 		sectors			= k.k->size - offset_into_extent;
 
-		ret = bch2_read_indirect_extent(&trans, iter,
+		ret = bch2_read_indirect_extent(&trans,
 					&offset_into_extent, &cur.k);
 		if (ret)
 			break;
 
 		sectors = min(sectors, k.k->size - offset_into_extent);
 
-		bch2_cut_front(POS(k.k->p.inode,
-				   bkey_start_offset(k.k) + offset_into_extent),
-			       &cur.k);
+		if (offset_into_extent)
+			bch2_cut_front(POS(k.k->p.inode,
+					   bkey_start_offset(k.k) +
+					   offset_into_extent),
+				       &cur.k);
 		bch2_key_resize(&cur.k.k, sectors);
 		cur.k.k.p.offset = iter->pos.offset + cur.k.k.size;
 
-		if (bkey_extent_is_data(k.k) ||
-		    k.k->type == KEY_TYPE_reservation) {
-			if (have_extent) {
-				ret = bch2_fill_extent(c, info,
-						bkey_i_to_s_c(&prev.k), 0);
-				if (ret)
-					break;
-			}
-
-			bkey_copy(&prev.k, &cur.k);
-			have_extent = true;
+		if (have_extent) {
+			ret = bch2_fill_extent(c, info,
+					bkey_i_to_s_c(&prev.k), 0);
+			if (ret)
+				break;
 		}
 
-		bch2_btree_iter_set_pos(iter,
-				POS(iter->pos.inode,
-				    iter->pos.offset + sectors));
+		bkey_copy(&prev.k, &cur.k);
+		have_extent = true;
+
+		if (k.k->type == KEY_TYPE_reflink_v)
+			bch2_btree_iter_set_pos(iter, k.k->p);
+		else
+			bch2_btree_iter_next(iter);
 	}
 
+	if (ret == -EINTR)
+		goto retry;
+
 	if (!ret && have_extent)
 		ret = bch2_fill_extent(c, info, bkey_i_to_s_c(&prev.k),
 				       FIEMAP_EXTENT_LAST);
-err:
+
 	ret = bch2_trans_exit(&trans) ?: ret;
 	return ret < 0 ? ret : 0;
 }
@@ -1449,12 +1455,6 @@ static int bch2_vfs_write_inode(struct inode *vinode,
 			       ATTR_ATIME|ATTR_MTIME|ATTR_CTIME);
 	mutex_unlock(&inode->ei_update_lock);
 
-	if (c->opts.journal_flush_disabled)
-		return ret;
-
-	if (!ret && wbc->sync_mode == WB_SYNC_ALL)
-		ret = bch2_journal_flush_seq(&c->journal, inode->ei_journal_seq);
-
 	return ret;
 }
 
@@ -1511,6 +1511,9 @@ static int bch2_sync_fs(struct super_block *sb, int wait)
 {
 	struct bch_fs *c = sb->s_fs_info;
 
+	if (c->opts.journal_flush_disabled)
+		return 0;
+
 	if (!wait) {
 		bch2_journal_flush_async(&c->journal, NULL);
 		return 0;
diff --git a/libbcachefs/io.c b/libbcachefs/io.c
index c5d9a0c5..e2ec5bea 100644
--- a/libbcachefs/io.c
+++ b/libbcachefs/io.c
@@ -454,7 +454,10 @@ static struct bio *bch2_write_bio_alloc(struct bch_fs *c,
 	struct bio *bio;
 	unsigned output_available =
 		min(wp->sectors_free << 9, src->bi_iter.bi_size);
-	unsigned pages = DIV_ROUND_UP(output_available, PAGE_SIZE);
+	unsigned pages = DIV_ROUND_UP(output_available +
+				      (buf
+				       ? ((unsigned long) buf & (PAGE_SIZE - 1))
+				       : 0), PAGE_SIZE);
 
 	bio = bio_alloc_bioset(GFP_NOIO, pages, &c->bio_write);
 	wbio			= wbio_init(bio);
@@ -912,30 +915,39 @@ flush_io:
 void bch2_write(struct closure *cl)
 {
 	struct bch_write_op *op = container_of(cl, struct bch_write_op, cl);
+	struct bio *bio = &op->wbio.bio;
 	struct bch_fs *c = op->c;
 
 	BUG_ON(!op->nr_replicas);
 	BUG_ON(!op->write_point.v);
 	BUG_ON(!bkey_cmp(op->pos, POS_MAX));
 
+	if (bio_sectors(bio) & (c->opts.block_size - 1)) {
+		__bcache_io_error(c, "misaligned write");
+		op->error = -EIO;
+		goto err;
+	}
+
 	op->start_time = local_clock();
 
 	bch2_keylist_init(&op->insert_keys, op->inline_keys);
-	wbio_init(&op->wbio.bio)->put_bio = false;
+	wbio_init(bio)->put_bio = false;
 
 	if (c->opts.nochanges ||
 	    !percpu_ref_tryget(&c->writes)) {
 		__bcache_io_error(c, "read only");
 		op->error = -EROFS;
-		if (!(op->flags & BCH_WRITE_NOPUT_RESERVATION))
-			bch2_disk_reservation_put(c, &op->res);
-		closure_return(cl);
-		return;
+		goto err;
 	}
 
-	bch2_increment_clock(c, bio_sectors(&op->wbio.bio), WRITE);
+	bch2_increment_clock(c, bio_sectors(bio), WRITE);
 
 	continue_at_nobarrier(cl, __bch2_write, NULL);
+	return;
+err:
+	if (!(op->flags & BCH_WRITE_NOPUT_RESERVATION))
+		bch2_disk_reservation_put(c, &op->res);
+	closure_return(cl);
 }
 
 /* Cache promotion on read */
@@ -1285,7 +1297,7 @@ retry:
 			bkey_start_offset(k.k);
 		sectors = k.k->size - offset_into_extent;
 
-		ret = bch2_read_indirect_extent(&trans, iter,
+		ret = bch2_read_indirect_extent(&trans,
 					&offset_into_extent, &tmp.k);
 		if (ret)
 			break;
@@ -1574,19 +1586,15 @@ static void bch2_read_endio(struct bio *bio)
 	bch2_rbio_punt(rbio, __bch2_read_endio, context, wq);
 }
 
-int bch2_read_indirect_extent(struct btree_trans *trans,
-			      struct btree_iter *extent_iter,
-			      unsigned *offset_into_extent,
-			      struct bkey_i *orig_k)
+int __bch2_read_indirect_extent(struct btree_trans *trans,
+				unsigned *offset_into_extent,
+				struct bkey_i *orig_k)
 {
 	struct btree_iter *iter;
 	struct bkey_s_c k;
 	u64 reflink_offset;
 	int ret;
 
-	if (orig_k->k.type != KEY_TYPE_reflink_p)
-		return 0;
-
 	reflink_offset = le64_to_cpu(bkey_i_to_reflink_p(orig_k)->v.idx) +
 		*offset_into_extent;
 
@@ -1893,7 +1901,7 @@ void bch2_read(struct bch_fs *c, struct bch_read_bio *rbio, u64 inode)
 			bkey_start_offset(k.k);
 		sectors = k.k->size - offset_into_extent;
 
-		ret = bch2_read_indirect_extent(&trans, iter,
+		ret = bch2_read_indirect_extent(&trans,
 					&offset_into_extent, &tmp.k);
 		if (ret)
 			goto err;
diff --git a/libbcachefs/io.h b/libbcachefs/io.h
index 7db3bd0e..80b72dbf 100644
--- a/libbcachefs/io.h
+++ b/libbcachefs/io.h
@@ -95,8 +95,17 @@ struct bch_devs_mask;
 struct cache_promote_op;
 struct extent_ptr_decoded;
 
-int bch2_read_indirect_extent(struct btree_trans *, struct btree_iter *,
-			      unsigned *, struct bkey_i *);
+int __bch2_read_indirect_extent(struct btree_trans *, unsigned *,
+				struct bkey_i *);
+
+static inline int bch2_read_indirect_extent(struct btree_trans *trans,
+					    unsigned *offset_into_extent,
+					    struct bkey_i *k)
+{
+	return k->k.type == KEY_TYPE_reflink_p
+		? __bch2_read_indirect_extent(trans, offset_into_extent, k)
+		: 0;
+}
 
 enum bch_read_flags {
 	BCH_READ_RETRY_IF_STALE		= 1 << 0,