bcachefs: fs_alloc_debug_to_text()

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

fs/bcachefs/sysfs.c

@@ -362,6 +362,37 @@ static void bch2_btree_wakeup_all(struct bch_fs *c)
 	seqmutex_unlock(&c->btree_trans_lock);
 }
 
+static void fs_alloc_debug_to_text(struct printbuf *out, struct bch_fs *c)
+{
+	unsigned nr[BCH_DATA_NR];
+
+	memset(nr, 0, sizeof(nr));
+
+	for (unsigned i = 0; i < ARRAY_SIZE(c->open_buckets); i++)
+		nr[c->open_buckets[i].data_type]++;
+
+	printbuf_tabstop_push(out, 24);
+
+	percpu_down_read(&c->mark_lock);
+	prt_printf(out, "hidden\t%llu\n",		bch2_fs_usage_read_one(c, &c->usage_base->b.hidden));
+	prt_printf(out, "btree\t%llu\n",		bch2_fs_usage_read_one(c, &c->usage_base->b.btree));
+	prt_printf(out, "data\t%llu\n",			bch2_fs_usage_read_one(c, &c->usage_base->b.data));
+	prt_printf(out, "cached\t%llu\n",		bch2_fs_usage_read_one(c, &c->usage_base->b.cached));
+	prt_printf(out, "reserved\t%llu\n",		bch2_fs_usage_read_one(c, &c->usage_base->b.reserved));
+	prt_printf(out, "online_reserved\t%llu\n",	percpu_u64_get(c->online_reserved));
+	prt_printf(out, "nr_inodes\t%llu\n",		bch2_fs_usage_read_one(c, &c->usage_base->b.nr_inodes));
+	percpu_up_read(&c->mark_lock);
+
+	prt_newline(out);
+	prt_printf(out, "freelist_wait\t%s\n",			c->freelist_wait.list.first ? "waiting" : "empty");
+	prt_printf(out, "open buckets allocated\t%i\n",		OPEN_BUCKETS_COUNT - c->open_buckets_nr_free);
+	prt_printf(out, "open buckets total\t%u\n",		OPEN_BUCKETS_COUNT);
+	prt_printf(out, "open_buckets_wait\t%s\n",		c->open_buckets_wait.list.first ? "waiting" : "empty");
+	prt_printf(out, "open_buckets_btree\t%u\n",		nr[BCH_DATA_btree]);
+	prt_printf(out, "open_buckets_user\t%u\n",		nr[BCH_DATA_user]);
+	prt_printf(out, "btree reserve cache\t%u\n",		c->btree_reserve_cache_nr);
+}
+
 SHOW(bch2_fs)
 {
 	struct bch_fs *c = container_of(kobj, struct bch_fs, kobj);
@@ -444,6 +475,9 @@ SHOW(bch2_fs)
 	if (attr == &sysfs_disk_groups)
 		bch2_disk_groups_to_text(out, c);
 
+	if (attr == &sysfs_alloc_debug)
+		fs_alloc_debug_to_text(out, c);
+
 	return 0;
 }
 
@@ -650,6 +684,7 @@ struct attribute *bch2_fs_internal_files[] = {
 	&sysfs_internal_uuid,
 
 	&sysfs_disk_groups,
+	&sysfs_alloc_debug,
 	NULL
 };