Update bcachefs sources to e990c131de fixup! bcachefs: BTREE_ID_snapshot_tree

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

.bcachefs_revision

@@ -1 +1 @@
-6a20aede294f72f3920146a352aa102a9fd3d0aa
+e990c131deed80152eaf640026edf792f6963031

libbcachefs/journal_io.c

@@ -1462,7 +1462,6 @@ static void journal_write_done(struct closure *cl)
 	struct journal *j = container_of(cl, struct journal, io);
 	struct bch_fs *c = container_of(j, struct bch_fs, journal);
 	struct journal_buf *w = journal_last_unwritten_buf(j);
-	struct bch_replicas_padded replicas;
 	union journal_res_state old, new;
 	u64 v, seq;
 	int err = 0;
@@ -1474,13 +1473,7 @@ static void journal_write_done(struct closure *cl)
 	if (!w->devs_written.nr) {
 		bch_err(c, "unable to write journal to sufficient devices");
 		err = -EIO;
-	} else {
-		bch2_devlist_to_replicas(&replicas.e, BCH_DATA_journal,
-					 w->devs_written);
-		if (bch2_mark_replicas(c, &replicas.e))
-			err = -EIO;
 	}
-
 	if (err)
 		bch2_fatal_error(c);
 
@@ -1672,6 +1665,7 @@ void bch2_journal_write(struct closure *cl)
 	struct bch_fs *c = container_of(j, struct bch_fs, journal);
 	struct bch_dev *ca;
 	struct journal_buf *w = journal_last_unwritten_buf(j);
+	struct bch_replicas_padded replicas;
 	struct jset_entry *start, *end;
 	struct jset *jset;
 	struct bio *bio;
@@ -1822,9 +1816,7 @@ retry_alloc:
 		bch_err(c, "Unable to allocate journal write:\n%s",
 			journal_debug_buf.buf);
 		printbuf_exit(&journal_debug_buf);
-		bch2_fatal_error(c);
-		continue_at(cl, journal_write_done, c->io_complete_wq);
-		return;
+		goto err;
 	}
 
 	w->devs_written = bch2_bkey_devs(bkey_i_to_s_c(&w->key));
@@ -1838,6 +1830,16 @@ retry_alloc:
 	if (nr_rw_members > 1)
 		w->separate_flush = true;
 
+	/*
+	 * Mark journal replicas before we submit the write to guarantee
+	 * recovery will find the journal entries after a crash.
+	 */
+	bch2_devlist_to_replicas(&replicas.e, BCH_DATA_journal,
+				 w->devs_written);
+	ret = bch2_mark_replicas(c, &replicas.e);
+	if (ret)
+		goto err;
+
 	if (!JSET_NO_FLUSH(jset) && w->separate_flush) {
 		for_each_rw_member(ca, c, i) {
 			percpu_ref_get(&ca->io_ref);

libbcachefs/replicas.c

@@ -550,8 +550,14 @@ int bch2_replicas_gc_start(struct bch_fs *c, unsigned typemask)
 	return 0;
 }
 
-/* New much simpler mechanism for clearing out unneeded replicas entries: */
-
+/*
+ * New much simpler mechanism for clearing out unneeded replicas entries - drop
+ * replicas entries that have 0 sectors used.
+ *
+ * However, we don't track sector counts for journal usage, so this doesn't drop
+ * any BCH_DATA_journal entries; the old bch2_replicas_gc_(start|end) mechanism
+ * is retained for that.
+ */
 int bch2_replicas_gc2(struct bch_fs *c)
 {
 	struct bch_replicas_cpu new = { 0 };

libbcachefs/subvolume.c

@@ -358,12 +358,18 @@ static int check_snapshot_tree(struct btree_trans *trans,
 	if (ret && !bch2_err_matches(ret, ENOENT))
 		goto err;
 
-	if (fsck_err_on(ret ||
-			!bch2_snapshot_is_ancestor(c,
+	if (fsck_err_on(ret, c,
+			"snapshot tree points to missing subvolume:\n  %s",
+			(printbuf_reset(&buf),
+			 bch2_bkey_val_to_text(&buf, c, st.s_c), buf.buf)) ||
+	    fsck_err_on(!bch2_snapshot_is_ancestor(c,
 						   le32_to_cpu(subvol.snapshot),
-						   root_id) ||
-			!BCH_SUBVOLUME_SNAP(&subvol), c,
-			"snapshot tree points to missing/incorrect subvolume:\n  %s",
+						   root_id), c,
+			"snapshot tree points to subvolume that does not point to snapshot in this tree:\n  %s",
+			(printbuf_reset(&buf),
+			 bch2_bkey_val_to_text(&buf, c, st.s_c), buf.buf)) ||
+	    fsck_err_on(BCH_SUBVOLUME_SNAP(&subvol), c,
+			"snapshot tree points to snapshot subvolume:\n  %s",
 			(printbuf_reset(&buf),
 			 bch2_bkey_val_to_text(&buf, c, st.s_c), buf.buf))) {
 		struct bkey_i_snapshot_tree *u;
@@ -586,6 +592,7 @@ static int check_snapshot(struct btree_trans *trans,
 		if (ret)
 			goto err;
 	}
+	ret = 0;
 
 	if (BCH_SNAPSHOT_DELETED(s.v))
 		set_bit(BCH_FS_HAVE_DELETED_SNAPSHOTS, &c->flags);